at 2920-2940 it might shoot .1s at 100 and screamer groups at 600,,
6BRAI nodes
- Thread starter Steelnecktie
- Start date
I tried velocity all the way down to 2900. Nothing looked even decent at 100. The only thing decent at 100 was fireforming loads, they were 1 ragged hole, after brass was fireformed, could not repeat it. I'm going back out this morning to test at 520yds, I've come to realize that it's just not going to shoot at 100 when tuned at 520. The only thing good to do at 100 is zero scope with this rifle.
I have all my notes from every shot down barrel, my groups at 100 were... .4 to.6MOA
.015" jump
31gr. @ 2900fps
31.3 @ 2930
31.6 @ 2960
31.9 @ 2990
32.2 @ 3012
Also tried jumping.030,.045,.060,
Tried jam .005, .010
Nothing besides fire forming load shot at 100yds. This is why I just went to 520yds and started testing.
To date, there are 233rds down barrel, going out this morning with annealed brass and see if annealing makes any difference at 520 with 3100fps load.
I've had great luck with all the powders mentioned . Varget has been the most accurate the three in my barrel 7 twist .237 Mullerworks . Had a 2nd round impact at 1165 on a 12" Alloy Target gong with a 105 hybrid, .31.5 varget ,some GENIX primers .020 OTL using wheeler method with zero load developement with 1 firing on formed brass . I beat my shooting partner using his 300 win with 210VLDs . This little guy really is a laser-hammer!!
-GW-
-GW-
I've shot 5 shot groups with this load at 500 3 times under 1". I'm measuring 20 shot group with 4 to 7mph wind conditions switching on me at 2.5". Shot 20 rounds this morning just under 2.5" with vertical at 1.5" for all 20 rounds. I'm not the best at judging let-ups in wind conditions.
I am going to get some H4895 to try, seems like the go-to powder for this cartridge. How is it on barrels compared to Varget?
Got some H4895, maybe get to load a few tomorrow and shoot a couple groups. Loaded a few tonight to test, 31gr is running 3020fps. It was showing more pressure than Varget at 3100fps. Guess I'll be testing the 2900-3000 nodes with H4895.
I will say that the few test rounds I shot were already better accuracy at 125yds.
I will say that the few test rounds I shot were already better accuracy at 125yds.
pat fulghum
( ͡° ͜ʖ ͡°)
My gun really loves 31.0 gr H4895 (2990-ish). 105 Hybrid at .014 off touch, CCI450.
At long range F-Class competition this weekend in near ideal conditions....
Sorted: 150-12x @800, 150-9X@900 and 199-14x @1000 (Great vertical!)
Half the rounds sorted: 195-8x (96-1x, 99-7x)
Unsorted: 198-2x (This is actually hard to get just 2x's out of 20 and still score 198)
One thing I learned this weekend the hard way..
I will never shoot another competition without sorting my 105 Hybrids.
It might not matter at mid range, but for long range...
At long range F-Class competition this weekend in near ideal conditions....
Sorted: 150-12x @800, 150-9X@900 and 199-14x @1000 (Great vertical!)
Half the rounds sorted: 195-8x (96-1x, 99-7x)
Unsorted: 198-2x (This is actually hard to get just 2x's out of 20 and still score 198)
One thing I learned this weekend the hard way..
I will never shoot another competition without sorting my 105 Hybrids.
It might not matter at mid range, but for long range...
Last edited:
Well, looks like 30.6gr. of H4895 is running at 2965fps. This testing at 125yds.
30.5gr. = .25MOA
30.6gr. = .1MOA
30.7gr. = .25MOA
I'll have to go out to 500yds and shoot a ladder and do more testing next month, time to go back to work.
So what is your guys thoughts on this? Not proven yet at 500, but to be continued......
30.5gr. = .25MOA
30.6gr. = .1MOA
30.7gr. = .25MOA
I'll have to go out to 500yds and shoot a ladder and do more testing next month, time to go back to work.
So what is your guys thoughts on this? Not proven yet at 500, but to be continued......
Seems light, I and a lot shoot 31.1with a fed. 205, does real good there but again I'm shooting a 103 and a 26" barrel at 2974 ...... Jim
pat fulghum
( ͡° ͜ʖ ͡°)
Do you really have a good statistical sample, I bet if you went out and shot them again... you might get .25, .25, .15 MOA... I have found that the tuning window is pretty large...
You didn't state what bullet and depth you are using..
And see my post about sorting if you go long or are trying to squeak out all accuracy.
I'm showing pressure with 31 gns of H4895 also and the 105s hybrids . My lot of H4895 is around 6 years old and its still 103 degrees out, 4895 has been the fast out r15 ,varget,h4895.
I haven't went into the sorting thing, just grab what is in the 500ct. box. I'm running Berger 105 VLD hunting jammed .005" past touching
Just went out and shot couple 5 shot groups at 500yds with 30.6gr. Wow, holding under .25 MOA each group. Vertical on 1 group was 1/4", wind switching had my horizontal just over 1".
Shot a ladder from 30.0 to 30.8, according to the ladder, I'm perfect with the 30.6gr. The 30.3 to 30.8 was 1" vertical, 30.0 to 30.3 was 2.25" vertical.
Which brings up another question???????
The ladders I've shot with both powders are with bullets that are colored differently with a Sharpie. All loads with Sharpie colors are pretty consistent at 35fps slower than a naked bullet. So question is, do you go by what the 35fps slower ladder says or shoot naked bullets and decipher hits some other way?
Just FYI I'm using labradar for velocity and sartorious entris i64 annalitical scale for powder measurements. There is no doubt as to my reading are true.
Just when I thought I've heard it all. LolAre you using standard Sharpies? Sinclair has the low drag Sharpies.
Alex Wheeler
Site $$ Sponsor
I have quite a few running 30.6. Different barrels, different powder lots, who knows, but its a common load like 31.1 is.
So, what's you and @tom take on the 35fps slower muzzle velocity with Sharpie? I know Tom test a lot at 1000, how are you guys getting around this? Are you just going with the powder charge that looks good with slower Sharpie speeds or you running camera system to verify hits with naked bullets?
Alex Wheeler
Site $$ Sponsor
I color from the tip to ogive. I dont color the shank of the bullet. I have never seen velocity change with colored bullets. All of my experience with chronys makes be base little to nothing on the numbers they give me.
Speaking of fast barrels, in my load development so far I'm getting an average MV of 2974 ft/sec in a 26" barrel from 29.8 grains of H4895 with 105 grain Berger hybrids, CCI450 primers, and bullets seated 5 thousandths off the lands. Ambient temperature around 55°F. I can't get anywhere near 31 grains of H4895. I stopped at 30.5 grains with heavy bolt lift and blanked CCI 400 primer. Muzzle velocity was 3062 ft/sec at 30.5 grains of H4895. Even at 29.8 grains bolt lift is a little stiff.
Varget and Reloader 15 seem more normal at 2948 ft/sec and 2934 ft/sec respectively from 31.5 grains, CCI 400's and the 105's seated 0.005 inch off the lands. there were no pressure signs with either the Varget or Reloader 15.
Accuracy still needs some work. H4895 seems to be the most accurate powder of the three in my rifle but also appears to be a little to fast burning for my setup.
Next step is to do the final neck turn on my twice fired brass to 0.0105 inch and to try 31.7 grains of Reloader and Varget. This should be close to the MV of the H4895 with better case fill and milder pressure curve. Probably will drop down to 29.7 grains of H4895 and see if the pressure signs diminish. If I can get good accuracy with less powder - all the better.
Upgrades & Donations
This Forum's expenses are primarily paid by member contributions. You can upgrade your Forum membership in seconds. Gold and Silver members get unlimited FREE classifieds for one year. Gold members can upload custom avatars.
Click Upgrade Membership Button ABOVE to get Gold or Silver Status.
You can also donate any amount, large or small, with the button below. Include your Forum Name in the PayPal Notes field.
To DONATE by CHECK, or make a recurring donation, CLICK HERE to learn how.
Click Upgrade Membership Button ABOVE to get Gold or Silver Status.
You can also donate any amount, large or small, with the button below. Include your Forum Name in the PayPal Notes field.
To DONATE by CHECK, or make a recurring donation, CLICK HERE to learn how.