Show me your 7mm long range groups.

[bigbore]

One of many 15 shot groups fired at 1000yds in preparation for World F Class Champs at Raton a couple of months ago.
This is from my 284 Shehane with 180 VLD Bergers.
Centre X ring is 5"

Cheers
Cam

 

[Terry]

Cam

Thanks for sharing!

That is very consistant.

Great Shooting!

 

[bigbore]

Thanks Terry. We put a lot of effort into finding the right combinations to achieve consistant 1000yard grouping.
What I did find after all this "work", the rifles in general shot very accurately at short range..... 100 yards and out.
Obviously it is harder to get good shots away with 7mm compared to 6mm with an F Open rifle, but with a lot of practice it is achievable.

Cheers
Cam

 

[Elwood]

One of many 15 shot groups fired at 1000yds in preparation for World F Class Champs at Raton a couple of months ago.
This is from my 284 Shehane with 180 VLD Bergers.
Centre X ring is 5"

Cheers
Cam

Ok I will be the one to ask, what happened to shot 12? ;D

Nice elevation.

 

[bigbore]

That is a very good question that I cannot answer. Just lucky it was shot months ago as my memory will not let me work that out
Maybe patched over by another shot. I have to give a simple excuse ;D
I could blame my wife as we alternated with marking during testing
( I am not going to entertain that the shot could possibly be out of the picture) ;D

Cam

 

[Ont0001]

I personally am a fan of the 7mm and use the 7WSM to drive 180g Berger Hybrids. Although I wasn't able to get a photo
of the "group" ,I was given one of the shot indicators after the match.
By the end of the day ,(2x2&20@1000yrd) the rifle was able to put 39 into the bull and 31 of those ,into the V (X).
http://bulletin.accurateshooter.com/2013/10/canadian-shoots-best-ever-100-16v-in-1000-yard-f-open-match/
Sold on the seven!
Gord O

 

[Erik Cortina]

I was doing testing and shot these groups. I have shot smaller but usually just make a note on my notebook and go on, I usually don't take pictures. The reason I took a picture this time is because both are the exact same load, but I did different prep on the ammo that shot the left group and I wanted to make sure it worked.

I did not change point of aim for the entire test and shot groups alternating between the two targets. These were shot with a 7mm wildcat (7mm FCM) based on a 7mm-300 WSM with shoulder pushed back.

 

[Bart B.]

Erik, I don't post pics. but draw a circle 2.8" and put 20 dots in it…... ..jim

I've always thought benchrest group agg's were the average size of a few or several groups shot; not the size of a circle encompassing all shots fired. Which means to me, an agg of 2.8 inches would include at least one group larger than 2.8". And the more groups shot in the agg, the more will be larger than their average size.

That's what I've seen looking at all of the agg's individual group sizes I have been able to find.

Comments?

 

[RGRobinett]

I've always thought benchrest group agg's were the average size of a few or several groups shot; not the size of a circle encompassing all shots fired. Which means to me, an agg of 2.8 inches would include at least one group larger than 2.8". And the more groups shot in the agg, the more will be larger than their average size.

That's what I've seen looking at all of the agg's individual group sizes I have been able to find.

Comments?[/quote]

Viewing it from that perspective (red above), regarding the AVERAGE: recording more groups, while maintaining the average, should also produce an equal number of SMALLER groups. That siad, one group may either "blow" an "Agg.", or, vice versa. In the real world, at contemporary [winning] Agg. levels, it's much more likely to "BLOW" an aggregate because the possible/probable magnitude is much greater for BIGGER, as opposed to significantly smaller - at least in "point-blank" benchrest! RG

 

[Bart B.]

Viewing it from that perspective (red above), regarding the AVERAGE: recording more groups, while maintaining the average, should also produce an equal number of SMALLER groups.

It might do just that. As long as the sum of all group's sizes all add up to a number divided by the agg's size equals the number of groups fired. If the agg's 3 inches after 5 groups are fired, the sum of 15 inches divided by 3 equals 5. Firing 10 groups would need a total of all groups' sizes to equal 30 so when divided by 10 the agg would stay at 3. Shooting 20 groups need their size total to equal 60 inches to still average 3 inches. I don't think it matters if there's an equal number of both larger and smaller groups.

All this is interesting to me as I've always measured a rifle and ammo's accuracy as the largest group it fires with at least 20 or 30 shots in it; that's what can be counted on near all the time. Got to look at a 270-shot group of Lake City arsenal's M118 7.62 match ammo that had a mean radius of 1.9"; about the average of single 10-shot groups as fired at 600 yards. But its extreme spread was over 10 inches for all 270 shots.

 

[Terry]

Jamesh

Great groups!

Thanks for sharing.

 

[Terry]

Gord O

Excellent

 

[johara1]

Bart, This is what i shot for a new 1000 yd. IBS. record with a Dasher…. 4.262, 2.839, 3.715, 2.996, 2.433 and 2.188 total was 18.433 the agg. is 3.0721… The score for those is 49, 50, 50, 50, 50 and 50 our 10 ring is 7", I can guess you would say they are centered ………. jim

 

[Bart B.]

Bart, This is what i shot for a new 1000 yd. IBS. record with a Dasher…. 4.262, 2.839, 3.715, 2.996, 2.433 and 2.188. . . . .

Well then, kudos to you with that record.

Thanks for sharing the details with me. You're the first benchrester that's shot agg records that's mentioned all the group's sizes to me. All the others refused to do so (for all sorts of reasons they never shared with me). Even those holding single-group records or few-group aggs wouldn't let me know what their biggest groups are.

I think we both know that group records in the BR disciplines are the smallest ones fired and all others are larger. Rarely, if ever, does that same record holding barrel (or shooter, for that matter) repeat them. Biggest groups fired are what interests me as my accuracy standard is what can be counted on all the time; it comes from being a bullseye scoring-ring competitor.

When a good friend won the 1000-yard Wimbledon Cup match at the Nationals in 1970 (32 shots in the 20" V ring shot from prone) with a borrowed 7mm Rem Mag, he, and the rifle's owner (Sierra Bullets' ballistic tech) who also loaded the ammo, and I knew that would start the 7mm bullets into competitive shooting. Too bad it took a few years for Sierra and others to make consistantly good 28 caliber, long, heavy match bullets.

Here's one of my long range tests with the .308 Win; page 2 in the following:

http://forum.accurateshooter.com/index.php?topic=3831950.15

 

[johara1]

Bart, I saw SSGT. Conners shoot 35V's at 1000 yds. at inter service at Lackland AFB. with a gas gun and they called it on kind of darkness. This will trip your trigger, that i did shoot a record before that was agg. of 49, 49, 49, 50, 50 and 50 for a total of 297 or an agg. of 49.500. So i bettered my own just shot record with 299 or an agg. of 49.8333, I also got the ten match agg. also. I guess an old jar head can still read the wind………… jim

 

[Bart B.]

Bart, I saw SSGT. Conners shoot 35V's at 1000 yds. at inter service at Lackland AFB. with a gas gun and they called it on kind of darkness.

I think he's the Greg Conners that was on the 1988 US Palma Team with me.

CWO/Capt Ray Green, USMC, broke my friend's 32-V record at the 1970 Nationals when he shot a 42-V clean (100-20V +22V) in the Wimbledon 2 years later; with a .30-.338 Win Mag as I remember. He was the OIC of the USMC detachment at Mare Island, CA, were I retired from the USN in 1978.

I've known a lot of tack-driving Jarheads; all a great bunch of folks to shoot with.

 

[johara1]

Bart, You know Dumpy Bartlet or Hathcock ?…… jim

 

[Bart B.]

Jim, yes; both. Had lunch one day between team and leg matches with Dumpy with other USA, USMC and USN team members at a regional in Virginia in 1971 just before the Interservice Rifle Matches in Quantico; I think this was when. Then chatted a bit with Gunny Hathcock at the Interservice match. We talked about handloading our .223 Rem. ammo for the DCM matches at Perry when M16's were going to be allowed for the first time. That was the year the USN Team all wore Mickey Mouse T-Shirts at the matches celebrating the Mouse Gun's entry into competition.

 

[johara1]

Bart, The Dasher will shoot small,but you better know when to yank the trigger……. jim