Author Topic: accuracy  (Read 84 times)

Offline Jimmyk

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accuracy
« on: May 17, 2019, 02:38:00 PM »
I have 2 Valkyries, both of them assembled by me. The first one I used a PSA barrel and bcg, Aero Precision upper, lower, and hand guard, Superlative Arms adjustable gas block, CMC trigger, Magpul MOE Rifle butt stock, VG6 EPSILON 556 Stainless Muzzle Device, Ergo pistol grip, and Burris XTRII 5-50 mounted in Burris PEPR 20 MOA base/rings. The barrel is 18" stainless with 1/7 twist. I shot it about 100 times, about 50 Federal factory 75 gr fmj, some Federal factory 90 gr Fusion, and the rest were my reloads. I might have had 2 groups of 5 shots out of the bunch that grouped 1". The rest were all the way up to 3.5", all shot at 100 yds off a bench with and without bipod/bags. I contacted PSA about it and they had me ship it back to them for evaluation. I got it back Wednesday late, loaded up some 88 gr Hornady ELD and went to the range. Out of 5 groups of 5, the smallest was 2.928" and went to 3.998". I got an email from PSA telling me they had swapped my 1/7 barrel for a 1/6.5 twist in the same 18" length. What do I look for to find my problem? The scope is brand new, bought from Opitics Planet, and has only been on this rifle. Any ideas or help would be appreciated!
Thanks, Jimmy

Offline trianglevelvet

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Re: accuracy
« Reply #1 on: May 17, 2019, 05:11:41 PM »
The 20" Valkyrie upper I got from PSA (1:6.5), came with the gas block touching the handguard ever so slightly on the inside.
I took a dremel to it on the inside of the handguard to create space so that there is about a 2mm gap.

Also check the fit between upper and lower. If there's any movement, think about fixing that.

The scope your using, is it an adjustable parallax scope?
If not what is the parallax distance?

Did you clean the storage oil/grease from the inside of the barrel before shooting it?


Offline Furdown

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Re: accuracy
« Reply #2 on: May 17, 2019, 08:52:23 PM »
Jimmyk,  To get the most out of the Valkyrie you need to hand load.   My build with factory ammo didn't get me there.  Having said that even at first my hand loads were nothing to get excited about.   Then after 500 rounds thing started to settle down and even factory ammo shot better.  Federal has a new 80.5 offering out for the Valkyrie.  Give them a try.   Good luck   

Offline JC

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Re: accuracy
« Reply #3 on: May 18, 2019, 10:47:01 AM »
I had the same problems, the lighter factory loads would shoot ok but that is it, heavy rounds were 5 inches apart lol. I found the 85 grain noslers can be loaded .010 off the lands in a standard mag and if you window the mag the 90 grain match kings shoot half inch groups. I tried at least 45 different combinations trying to get it to shoot and it was a huge relief when it finally did. good luck!
Work up to it but both are under recommended max charge. CFE showed absolutely no pressure signs, 4350 was flattening primers just a little. I am taking my chronograph to the range today and will update later.

The 85 grain load that shot best for me was with CFE223 @ 24.1
The 90 match king was with 4350 @ 26.5
starline brass

Offline JC

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Re: accuracy
« Reply #4 on: May 18, 2019, 06:18:32 PM »
the 90 grain shot an average 2567 fps
the 85 grain shot an average 2484 fps