Click to enlarge
Mn State Service rifle Team for 2012
Mn State Service rifle Team for 2012
Friday, May 28, 2010
Friday, May 21, 2010
Rifle Sights not Plumb ???
Often we hear shooters talking about their windage zeros being different at different distances. It's not uncommon to have a 600 yd no-wind zero that is two min. of angle different than our no-wind zero for 200 yds. There are two things most responsible for these differences due to change in distance.
First is the fact that we mostly shoot Sitting Rapid fire at 200 yds and we all tend to cant (tilt) the gun a little clockwise if we are right handed (counter clockwise if left handed) due to a natural tendancy to lean over a little in the sitting pos. At the 300 and 600 yd line, we are shooting from the prone position, where a right handed person will tend to cant (tilt) a little into his position (counter clockwise) and therefore will have more right windage (or less left windage) on the gun than in the Sitting position.
Second is the possibility that the front sight is not on the gun straight in line with the rear sight and therefore the rear sight when raised and lowered does not follow the plumb line of the front sight. We see this on the target as the strike of the bullets straying farther and farther right or left as we run the sights up from 200 yd zeros to 600 or 1000 yd zeros. We cant rotate the rear sight to be at Top Dead Center, on a service rifle, so when shooting prone we must just realize that we may need to add windage as the sights are raised to compensate for the off verticle relation of the rear sights.
In the paragraphs below Capt. Bob Peasley discusses the method of using a thermometer target to determine if this is the case with your sights and what to do about it.
A 100 yd thermometer target would have a 6 in black "bulb" to aim at and then a vertical line running up from that about 2 ft-- assuming you hit the 'bulb" with your 100 yd zeros, then, moving your sights up the usuall 14 min of angle, your hits should fall on the plumb line 14 inches above the first group.
Capt. Bob........
"Kurt:
You may have a better idea or plan but for what it's worth I am passing this along. I have noticed that many of the SR guys are off by as much as 1 or even 2 minutes on their wind zeros. With no sighters this is a big deal as you know. Here is how I obtain a really solid wind zero at 2, 3 & 600.
I use a thermometer type target at 100 yards and shoot the normal positions. I drop a chalk line from the top right thru the wind line on the bullseye. I put on what I think is my 200 elevation and no wind zero and shoot a 4-5 shot group to see if it is on the vertical wind line. Then put on your 300 elevation and shoot 4-5 more to see where the group is. Then repeat with your 600 elevation. If the 5 shot group is not on the wind line at the 600 elevation start cranking till your group is dead nuts on. Note that setting on the wind knob and mark it. Simple as that, and maybe the guys are doing this or have something even better. They may find that with the 300 elevation they have to put on a couple clicks of wind different that 200 either way to get on the line. Same at 600. Come up from 3 to 600 setting and the group may not follow the vertical line.
On of my Ar's my wind zero is about 1/2 or 3/4 minute right of the index at 300 and 1/4 or 1/2 minute left of the index at 200. Most likely a position thing but at least I know.
It's probably not an issue on the AR due to sight design but using this technique I discovered a couple of my M1A's had curved rear sight bases. When it was cranked up it also moved right. So when I went from sitting to 300 I had to go 1 minute left for no wind zero. From 3 to 600 I had to crank on another 2 1/2 or 3 minutes. My first theory was that a wind from the left affected a left hand shooter more than a right handed shooter! Ahhh to be young and foolish again!
Anyway, feel free to pass this along or not as you see fit. My goal will to be nothing worse than a 9 for wind on everybody's first shot at 600."
Bob Peasley
Thanks Bob
First is the fact that we mostly shoot Sitting Rapid fire at 200 yds and we all tend to cant (tilt) the gun a little clockwise if we are right handed (counter clockwise if left handed) due to a natural tendancy to lean over a little in the sitting pos. At the 300 and 600 yd line, we are shooting from the prone position, where a right handed person will tend to cant (tilt) a little into his position (counter clockwise) and therefore will have more right windage (or less left windage) on the gun than in the Sitting position.
Second is the possibility that the front sight is not on the gun straight in line with the rear sight and therefore the rear sight when raised and lowered does not follow the plumb line of the front sight. We see this on the target as the strike of the bullets straying farther and farther right or left as we run the sights up from 200 yd zeros to 600 or 1000 yd zeros. We cant rotate the rear sight to be at Top Dead Center, on a service rifle, so when shooting prone we must just realize that we may need to add windage as the sights are raised to compensate for the off verticle relation of the rear sights.
In the paragraphs below Capt. Bob Peasley discusses the method of using a thermometer target to determine if this is the case with your sights and what to do about it.
A 100 yd thermometer target would have a 6 in black "bulb" to aim at and then a vertical line running up from that about 2 ft-- assuming you hit the 'bulb" with your 100 yd zeros, then, moving your sights up the usuall 14 min of angle, your hits should fall on the plumb line 14 inches above the first group.
Capt. Bob........
"Kurt:
You may have a better idea or plan but for what it's worth I am passing this along. I have noticed that many of the SR guys are off by as much as 1 or even 2 minutes on their wind zeros. With no sighters this is a big deal as you know. Here is how I obtain a really solid wind zero at 2, 3 & 600.
I use a thermometer type target at 100 yards and shoot the normal positions. I drop a chalk line from the top right thru the wind line on the bullseye. I put on what I think is my 200 elevation and no wind zero and shoot a 4-5 shot group to see if it is on the vertical wind line. Then put on your 300 elevation and shoot 4-5 more to see where the group is. Then repeat with your 600 elevation. If the 5 shot group is not on the wind line at the 600 elevation start cranking till your group is dead nuts on. Note that setting on the wind knob and mark it. Simple as that, and maybe the guys are doing this or have something even better. They may find that with the 300 elevation they have to put on a couple clicks of wind different that 200 either way to get on the line. Same at 600. Come up from 3 to 600 setting and the group may not follow the vertical line.
On of my Ar's my wind zero is about 1/2 or 3/4 minute right of the index at 300 and 1/4 or 1/2 minute left of the index at 200. Most likely a position thing but at least I know.
It's probably not an issue on the AR due to sight design but using this technique I discovered a couple of my M1A's had curved rear sight bases. When it was cranked up it also moved right. So when I went from sitting to 300 I had to go 1 minute left for no wind zero. From 3 to 600 I had to crank on another 2 1/2 or 3 minutes. My first theory was that a wind from the left affected a left hand shooter more than a right handed shooter! Ahhh to be young and foolish again!
Anyway, feel free to pass this along or not as you see fit. My goal will to be nothing worse than a 9 for wind on everybody's first shot at 600."
Bob Peasley
Thanks Bob
Monday, May 17, 2010
Sunday's Service Rifle Leg Match
Phil Klandrude was the top non-Distinguished shooter and thus won a leg and 8 pts after five 2nd place finishes over the last few years. Congradulations to Phil, it was a well earned award.
I'll add more on this match tomorrow.
But we do have---------
Pictures of the leg Match --- Click Here !
Saturday, May 15, 2010
Flash -- Pictures in from GRRC Service Rifle Clinic--Sat 7pm
Today's Service Rifle clinic and M1 Garand match at GRRC were both well attended. Thirty two aspiring shooters benifited from Kurt Borlaug's instruction in the "How to's" of service rifle shooting and an introduction to Highpower competition.
It couldn't have been a nicer day to be at the range pulling some triggers --- 70 deg with just a light breeze to be refreshing. Experienced coaches were assigned to each shooter who talked and coached each shooter through the 50 rd match. Each participant shot 10 rds Standing, then 10 rds rapid fire from the sitting , and the prone position, and 20 rds from the prone position. Every body had a few good shots to brag about and a few bad shots to forget about. I looked to me that everyone was enjoying the experience. We all hope to see them come back to another match in the near future.
I'll rearrange and label some of the pictures tomorrow.
There is another Match tomorrow at GRRC. It's the same as it was today. 50 rds over the course for service rifles, starts at about 1100 hrs, earlier in the morning after an 0900 start is a 2 man team match.
Come out and shoot!
Thursday, May 13, 2010
Service Rifle Clinic and Leg Match
Two Important shooting days this weekend.
Saturday -- May 15th
GRRC hosts it's annual Service Rifle Clinic this coming Saturday-- May 15th. New Service Rifle Shooters will attend a class on Service Rifle highpower shooting Saturday morning and fire a 50 rd CMP qualifying match following both slow and rapid firing demonstrations. Note: The Harris exit off of I35 is now open and anybody attending festivities at GRRC this weekend can use that exit? North Branch is now in surgery. Thanks, Kurt
Program for Clinic -- click here Map to GRRC
From Kurt Borlaug:
" Boys, Sorry for the duplication of some of you on this missive. GRRC will have it's HP Clinic this Saturday. We are doing a one-day clinic w/ classroom in am and the actual match starts at 12 noon.
I'm asking (pleading begging) for some help with coaches and pits. We are planning to run in three relays as the clinic will shoot concurrently w/ our M1 CMP Match. We request your presence by 11 am.
If you are able and willing please respond by this Wednesday. Last year we had some outstanding help from Non_GRRC members and it made the event go quite smoothly. Remember that these folks are newest of the new and too much info can hamper their experience. Safety is our first concern of course, and the Mn. Rifle Team has a great opportunity to be ambassadors of the sport.
Thanks for the consideration ",
Kurt Borlaug kubeborlaug@msn.com
Clinic UP-DATE 5/13 1130hrs
Gentlemen, We will have over 30 clinic students this year. The e-mail traffic over the last few weeks has been heavy.
With this amount of students we believe that the coaches need to distinguish themselves from the students by wearing orange vests......seriously! If you have one of your own great, GRRC has some in the refer in the Island shed. Tom Torborg will be our official "Registrar" in charge of general Cat Herding. He can distribute the vests if you need one.
We need you there by 9am, no later than 10:00. I earlier said 11 but we have upped the time. The actual match starts at 12 noon. Those of you working pits are going to be prepping buckets for the match as well as covering live fire demo.
See you Saturday, bring patience!! Later,
Kurt
Sunday-- May 16
GRRC will host the first Leg Match of the season in this area. Nervous Service Rifle shooters will be lining up and starding tall Sunday morning at Gopher's 200 yd line, and anticipating earning some of those elusive leg points, and climb that ladder towards a Distinguished Rifleman's Badge, that every Service rifle shooter aspires to earning. Those shooters that are not in the hunt for Leg points will compete for the Medals and just for fun.
From Kurt Borlaug:
".... don't forget the Leg Match on Sunday. We will run a two-man Hearst Match starting at 9am. A $5 donation is requested for entry and awards will be determined by participation for this event. Pair firing is required at 200 Offhand and 600 slow-fire. You are allowed to coach each other with a scope at 300 rapid.
Leg Match starts not before 12 noon."
Kurt Borlaug
Saturday -- May 15th
GRRC hosts it's annual Service Rifle Clinic this coming Saturday-- May 15th. New Service Rifle Shooters will attend a class on Service Rifle highpower shooting Saturday morning and fire a 50 rd CMP qualifying match following both slow and rapid firing demonstrations. Note: The Harris exit off of I35 is now open and anybody attending festivities at GRRC this weekend can use that exit? North Branch is now in surgery. Thanks, Kurt
Program for Clinic -- click here Map to GRRC
From Kurt Borlaug:
" Boys, Sorry for the duplication of some of you on this missive. GRRC will have it's HP Clinic this Saturday. We are doing a one-day clinic w/ classroom in am and the actual match starts at 12 noon.
I'm asking (pleading begging) for some help with coaches and pits. We are planning to run in three relays as the clinic will shoot concurrently w/ our M1 CMP Match. We request your presence by 11 am.
If you are able and willing please respond by this Wednesday. Last year we had some outstanding help from Non_GRRC members and it made the event go quite smoothly. Remember that these folks are newest of the new and too much info can hamper their experience. Safety is our first concern of course, and the Mn. Rifle Team has a great opportunity to be ambassadors of the sport.
Thanks for the consideration ",
Kurt Borlaug kubeborlaug@msn.com
Clinic UP-DATE 5/13 1130hrs
Gentlemen, We will have over 30 clinic students this year. The e-mail traffic over the last few weeks has been heavy.
With this amount of students we believe that the coaches need to distinguish themselves from the students by wearing orange vests......seriously! If you have one of your own great, GRRC has some in the refer in the Island shed. Tom Torborg will be our official "Registrar" in charge of general Cat Herding. He can distribute the vests if you need one.
We need you there by 9am, no later than 10:00. I earlier said 11 but we have upped the time. The actual match starts at 12 noon. Those of you working pits are going to be prepping buckets for the match as well as covering live fire demo.
See you Saturday, bring patience!! Later,
Kurt
Sunday-- May 16
GRRC will host the first Leg Match of the season in this area. Nervous Service Rifle shooters will be lining up and starding tall Sunday morning at Gopher's 200 yd line, and anticipating earning some of those elusive leg points, and climb that ladder towards a Distinguished Rifleman's Badge, that every Service rifle shooter aspires to earning. Those shooters that are not in the hunt for Leg points will compete for the Medals and just for fun.
From Kurt Borlaug:
".... don't forget the Leg Match on Sunday. We will run a two-man Hearst Match starting at 9am. A $5 donation is requested for entry and awards will be determined by participation for this event. Pair firing is required at 200 Offhand and 600 slow-fire. You are allowed to coach each other with a scope at 300 rapid.
Leg Match starts not before 12 noon."
Kurt Borlaug
Subscribe to:
Posts (Atom)