300 Blackout/300 Whisper Reloading

[HUNTER2]

Bolt and SS - neither has any fouling difference between max and sub loads. Very clean. You talking AR?

[Spook]

Originally Posted by 1911man

Based on the 6 bbls I've been testing (4 300AAC and 2 300 Whisper chambered) the Whisper chamber is more accurate with supersonic loads because the BLACKOUT has a much larger and longer throat area to accomodate more fouling build-up from suppressed firing. I can see no obvious difference in pressure signs between the two chambers. Ammo loaded using Redding 300/221 dies and Forester 300 BLACKOUT dies both work just fine in either chamber.

Finally ! Thanks, it appears.....The Emperor isnt wearing any clothes.

[milehipo]

Well I give up! If anyone is interested in purchasing a really nicely built functional but not consistant with groups, send me a pm.

[Hoser]

Originally Posted by milehipo

Well I give up! If anyone is interested in purchasing a really nicely built functional but not consistant with groups, send me a pm.

If I had any idea what you had tried to do to fix the problem I might be interested.

Lots of us here tried to offer advice but...

[srm109]

Try replacing the trigger! I installed a RRA 2-stage match trigger in my 300 Fireball. Cut my 100 yard groups in half! I'm shooting 1" - 1.5" groups all day long. Was 3-4"! Cost me $110.00, money well spent!

[milehipo]

I have replaced the trigger and it breaks like glass.
Well thanks to all that chimed in.

[dick]

I installed a TUBBS carrier weight and enedine hydraulic buffer. This slows the function of my over gassed, pistol length 16" upper. I only shoot heavy's for sub stuff. This combo helped my groups.

[Bull 228]

Does your set up cycle with the Tubbs weights added? and the Enidine buffer? What loads are you putting through the rifle? Wondering if that would work on a 10.5" with pistol gas set up. Thanks.
NT

[dick]

Yes, I am using both the carrier weight and hydraulic buffer. My carbine is a pistol length gas system 16" barreled upper. It cycles unsuppressed with 220,240 matchkings,225 outlaws,240 outlaws, using nv-110 and h-110. I believe this set up also helps feeding the outlaws from a unaltered GI mag. I did preform a little ramping to the barrel extension, though nothing major.

[dick]

Here are some photos, first time posting pictures hopefully you can see them.
Case length 1.4"
OALL 2.165" loaded with 240gr Outlaw State Bullet
This load is touching the rifling in my upper, and I'm pushing it with 9.4gr of VN-110 and FED small Rifle match primer, Winchester brass.
The land between feed ramps, was taken down with a dremel tool, following the same angle of the feed ramps. I find that if you take it slow not that much material needs to be removed. I also nocked down the sharp outer edges of the feed ramps with some small diamond files, purchased from Harbor Freight. Finally I filed in some M-4 feed ramps into my upper receiver this one did not have them, and a little polishing dosn't hurt. Runs Smooth and Reliable!!!