|
Probably true, but I wanted a quality upper that was ready to go. Shooting 25 round 1 MOA groups (side to side, not center to center) with supersonic ammo at 100y meets that desire. I just need to find a combination of buffer/spring/bufer tube that will work correctly. The evening I recieved the Noveske upper, I took it to the NRA HQ range sitting on top of my service rifle rock river lower with a rifle length buffer tube/spring/buffer combo. With 225 Hornadys over 10.6 grains of 1680, it cycled fine. When I put it on a brand new Rock River carbine lower and tried the same loads, it didn't work. (a little fact I didn't realize until a few days ago while trying to figure out what was going on).
After talking to Noveske this week, I went back to check the buffer tubes and springs in each of my 300 WTF;s and found that the new pistol and carbine lowers I bought have thicker, 2 coil longer springs that take more pressure to compress than the Colt lowers I have. They also have a rougher interior to the buffer tube than the Colts and the RRA Service rifle lower that I have logged thousdands of rounds in. Consequently, I ordered 2 DPMS springs, a Cot H and H2 buffer and a Tubb BCG weight addition. Between all those and what I have, I should be able to find a winning combo.
BTW: I just got back from the range where I shot the Noveske upper with 240 SMK's over 10.7 grains of 1680. It cycled fine and put all 10 proof rounds into .45" at 50 yards. That tells me it's on the border of resolution.
As for the pistol upper, I've got some more test rounds loaded with 1680, N110, and RE7. Once the new springs come in on Tuesday, I'll run through all the combinations until I find a winner. I've gotten great accuracy from this little barrel, I just need to marry it up to the right lower. I'll also take a Colt and DPMS carbine lower as well to see it that makes a difference (quality of buffer tubes).
|
Threaded Mode