mark75101

Got a break in the weather and went back out. Tried increasing torque, shooting without the rail/ shooting without the gas block and tried the barrel on another upper receiver. No change. Also tried three more loads: Hornady super match 75 gr, a 77 gr handload a buddy had and a 60 grain sierra loaded with data 68. The 75 gr group was about 3 1/2" at 100, the 77 gr was 1 1/4" the 60 was just under 1 1/2".

Kept me entertained.

I'll pull the handguard/increase torque. Might order a new stripped upper too.

Is there a way to post pics from my iPhone?

Seemed pretty tight That's a subjective term. Did it need a rubber mallet to fit, did the muzzle wobble back and forth prior to the nut being tightened? Yes I guess it is subjective. It did not seem loose but it slide right in. No mallet needed.

No bridging. Scope mount for the leopold is not great lol but seems to work. Its the set up I use whenever I get a new rifle just for checking loads. The Acog has a LaRue mount and the Vortex has a ADM mount.

1. Both factory and reload. Random groups at 100 2. Slight rubbing on the gas tube with the fail zero bolt. The RRA seems smooth as silk, its a old BCG with alot of rounds through it though. 3. Yes. No change. 4. Torque, release, no repeat. Maybe thats it? The first barrel I torqued to 40, after seeing bad accuracy I pulled the forend and torqued to 45, no change. Haven't tried re-torqueing the second barrel though. If you think it might help I'd have no problem torqueing to a higher ft/lb. 5. Yes, 3 set screws. The barrel came with one dimple which did line up. I did not dimple the other two, just tightened till it hit the barrel and called it good for now. 6. Yes, probably not credit card thickness though. Just a slight gap because thats where it ended up with the factory dimple for set screw.

Seemed pretty tight

About a month ago I put together another upper using a Rainier Arms Select 16" 1/8 mid length. I've tried 52, 55, 62, 68 and 69 grain ammo and it seems to shoot about 3 1/2"-4" at 100 yards. I tried 3 scopes and two shooters, got frustrated and sent the barrel back for replacement. The replacement is just as bad. I can put my 16" RRA upper on the lower and at least cut the group size in half. Is there something I missed in the assembly? I really don't want to believe its the barrel. The only thing I can think of at this point is the upper itself. Its a flat top thats been in my safe so long I don't remember where I got it. Can the upper reciever itself make a difference? The rest of the specs: Giesselle Mk 4 rail, barrel nut torqued to 40 ft/lbs as per instructions. MI low pro gas block (3 set screws) A2 flash hider, althought I did try it without a flash hider just to take it out of the equation. Tried two lowers, RRA with 2 stage NM trigger and Spikes with Fail Zero trigger. Leopold 12X with fine target dor TA31RCOM4 acog 2.5X10 Vortex. Any ideas? Thanks Mark

I don't get that from hand loading, wish I did....I'd probably load alot more

Cool, I've been looking for an excuse to buy one

Thanks, I guess I'll need the 223 powder funnel anyway.

Will the 9mm shellplate work for 223? Or do I need both? Thanks Mark