New 4500 psi 500 cc bottle test on the .257 Talon/Dor

OK, got the 500cc 4500 psi bottle in late yesterday, and got it ready to do a bit of testing this afternoon. Only had about an hour to test, but learned a lot already. 😀

I have recently experimented with overfilling the factory bottle. And “NO” Don’t do this!!! My bad, and my foolishness.

Now for the results so far. The factory bottle (500 cc’s) at 3000psi in the 21″ barreled .257 with a 60 grain NOE was shooting at 930’s. It did shoot quite a bit faster with the original valve that Doug made for it, but it was bored out “TOO” much and finally failed. It was putting out in the 970 range.

I pushed the factory bottle up to 3400 psi and it climed to the same 970 the old valve did at 3000.

Enter the 4500 bottle. I filled it to 4000 and did a string. It was 990-998-1007-1021-1012-1002-990–983-976-971—-WooHoo!!!!!!!! :8:

I then ran her up to 4500 and the bullet hit the ground in front of the target at 80 yards. Dayum!!!

Need more spring I guess. But she sure is Shooting Good!!! Blowing like a Mother Today, so no real accuracy test. A little over an inch was the best I could do.

Running into something odd though. 5 shots on the money, then a sudden drop of about 2 inches and 2″ to the left. And a good group there. Two completely different groups. 😯

Ran the test again and it repeated. exactly!

Obviously, I need more testing!!!

Knife