What's accurate?

[fullersson]

I built a 6br on a Savage Target action with an 8 twist Krieger shooting Berger 105 VLD's. My average is under 1/2 MOA out to 300 yards. Right now the average is 1.33 in. at 300 yards the average was around 1.050 in. but I didn't have such a good day of shooting today. I'm just wondering what type of average everyone else has at 300 yards with the heavier VLD's, because truthfully I was looking for 1/4 MOA out of this gun. I'm shooting 33.1 grains of H414 out of Lapua Brass with CCI 450's and 105 Berger VLD's. Thanks, Brian.

 

[MarkS]

fullersson,

I like to see 0.5" at 200 yds and 1" at 300 yds, out of my 600 yds Benchguns - Bat action. You shooting very good accuracy for the range you are shooting. I have not tried H414 in a 6BR. Have you tried Varget or RL15? 1/4 moa is alot to ask of any action/gun, and may be too much to ask from a Factory action. There are alot of wind factors over 300yds, 3 times what 100 yds will see. You are doing good.

Mark Schronce

 

[deadlyswift]

I agree with MarkS! I have a 6br built on a Savage target action. With a Broughton 5c 8tw and it has shot several .5moa groups at 500yrd and a few under .5 moa. Even with the same load on different days I have shot groups that where just over 1 moa at 500yrd. I believe the load is right as well the gun is right! It seems that some days the nut behind the butt (me) just can't get right ;D!! I shoot the 105gr Berger hunting vlds because of the Higher BC over the Target Vlds, but I doubt the Higher BC hunting vld will make any difference at 300yrd. Probably not even at 500 either? I continue to shoot the hunting vld over the target bullet because that is what the throat on my reamer was set with, and it seemed to have work out well for me so far.
Mark

 

[BoydAllen]

Just out of curiosity, what sort of velocity are you getting, and what sort of bench, and rest/sandbag setup are you using? Are you using flags?

 

[fullersson]

As far as velocity goes I haven't chronographed it yet, but it takes about 4 1/2 MOA too get to 300 yards. According to JBM thats around 2800 FPS if I remember correctly. The front rest is a Caldwell BR and the rear bag is a Protektor. I do use windflags not quite as many as you would see at a competition. I have wind flags set up at 100, 200, and 300 yards. Thanks for the help. Brian

 

[BoydAllen]

Have you tried tuning by loading at the range?

 

[DCRYDER]

I agree with MarkS.

Off subject, but I really don't like the use of MOA when it comes to accuracy of a rifle.

If a rifle can agg a .250" at 100 yards does that mean that it will agg 2.5" at 1000 yards???

Too many variables when the range is lengthened. In 100yd BR there are several fellas that would be disappointed to agg anything over .2 MOA, those same fellas would probably be VERY happy at 200yds to shoot .2 MOA groups consistantly.

 

[6BRinNZ]

on this theme - do you guys use 5 x 5 shot groups averaged in order to say a gun is agging x" ?

I ask as when I started out I went nuts trying to get mine to shoot .2 at 200 as everyone on this site was shooting .1 at 100...LOL...the joys of a steep learning curve..

 

[fullersson]

I don't have the setup for loading at the range however during load development sometimes I will go to the range 3 times a day narrowing down what's going to work. I actually use 3 x 5 shot groups averaged for an agg. because that is how they do it in the local club competition I shoot in, but the big boys use 5 x 5 for agg. When I say my average I'm basing that on 10 or 20 groups which would be 50 or 100 shots. For the first 50 or 100 shots I average everything together and after that I compare the groups to the average. I feel it is a more truthful test of the gun's capabilities.

 

[DCRYDER]

6BR, do a search for IBS group match results and see what the winners shot, these are 5-5shot groups. They are listed in MOA so they can combine 100 and 200 yards "scores" for the grand agg. If you can do .2 MOA at 100 and .25 MOA at 200 you would be very competitive. If you could do .15 MOA at 100 and .2 MOA at 200 you would be unbeatable.

You have to also remember, these competitions were shot on Sundays from 9AM til 5PM regardless of wind, rain, and snow.

BEWARE of the man that says he shoots one-hole groups ALL THE TIME!!! I used to believe them too!!!

 

[alf]

I want my 1K guns to agg at or just under 3/4" at 300 yards in as close to perfect conditions as possible.

On match day, that leaves only one person to point the finger at.....

 

[MarkS]

fullersson,

When I am working up loads, I shoot many 3 shot groups, starting at 100 yds. I think 5 shot group are testing you and the gun, wind reading skills, etc. The next thing I look for ES velocity of the load. The best load at 100 yds will not shoot at long range, if it has a high ES. I like to see 20 or less. I have seen loads shoot 0.1" at 100yds and 0.5" at 200, all vertical. I take the best loads to 200 yds, and pick the best from there. For me there is too many conditions to deal with at ranges past 200 yds in load development. I do test my pick at long range on steel targets, so I can see what is going on. This has always worked for me. I did the 5x5 groups on my first custom built, trying to get the little bughole. I wore out he barrel working up groups.

Good luck

Mark Schronce

 

[fullersson]

Thanks to everyone for the advice it's appreciated. I went to the range today to practice my wind reading (15mph with 26mph gusts) and I got beat on pretty bad. Out of five groups (five shots per group) I shot 1.600, 1.750, 1.900, 2.200, and 2.350 that is an average of 1.960. Sounds like I need more wind reading practice than anything. In my defense alot of those shot were taken intentionally in opposite conditions to see the affect of the wind on the bullet. All in all it was a very educational day. Thanks again for all the help this is a great forum.

 

[in2deep]

During break in my 6 BR Savage shot 5 rounds of Factory Lapua into 1 1/4" of vertical and not even 1/4" wide group so looks promising so far.

 

[CaptainMal]

Was talking with Allen Arnette, who won the National Bench Rest Shoot in Florida at Manatee last weekend. His winning aggrigate over both 100 and 200 yard days was about .27 MOA.

It was a bit windy that weekend. Real world conditions gave real groups. I covered the shoot for the local club newsletter and was surprised at HOW LARGE some of the groups were.

Anyhow, he told me that most everyone has a target folded in their wallet. That target has a group on it that's .0 or .1 something. Often it's a three-shot group. Then they brag how good their gun shoots. "Bring 'em on"!

I know my 6 Dasher heavy bbl. can shoot .1's one day and .6's the next. Think you are doing fine.

 

[johara1]

Try berger 108's with varget or RL-15 with cci 450 primers,i could never get the 105's to fly that good. Seating depth is the key to small groups in a dasher and i think the BR is the same. Are you using a factory trigger? is the action bedded? There are so many things that can play a big part, we have to know more about your equipment than than what you stated here, to help you. I'm fire forming brass for this year for my two dashers and i shot 10 rd groups, and they stayed in .300 @ 100, those groups will not cut it for1K.......jim

 

[fullersson]

My equipment consists of a Savage target action (stock trigger/stock everything), the stock is a heavy benchrest from sharpshooter supply (bedded with devcon by John Whidden from Ga.), the barrel is a 8 twist Kreiger that I chambered and crowned myself (PTG reamer from Midway), the scope is Nightforce 12x42br, the front rest is a Caldwell br, and the rear bag is a Protektor.

 

[RonAKA]

I have a Savage LRPV that I primarily shoot at 100 meters. It has the single shot Target Action and a 26" 12 twist factory 6BR barrel. I have done a single ladder test on three bullets at 300 meters using three shot groups. I can cherry pick a few groups that are about 3/4", but they would not average that. Probably not fair averaging ladder test groups as you are looking for both good and bad loads. These are all flat base 68 and 69 grain bullets so perhaps not ideally suited to that distance.

That perhaps gives you some idea what the Savage factory setup can do.

 

[jonbearman]

I have a 14 twist in 6 BR and shoot arnette 68 grain flat base and at a 100 so far it shoots little tiny bugholes and this with a stock sleeved xp-100 action with a sako extractor and dual ported being a pistol reciever.It was built by a guy off this forum and it shoots marvelous.I use H322 powder and remington benchrest primers seated touching the lands.It just plain shoots.I hope to do some 200 yard and up shooting this spring.