6br light weight bullets test target,... question

[BradY]

H322 and federal gold small rifle primers worked best for me. 55gr nosler BT’s were very tolerant of bullet jump. Don’t worry about chronograph numbers as they are a 300yd bullet. If you want to shoot further then shoot a high bc bullet. Nice splat factor from the noslers.

 

[LHSmith]

Thats next,... loaded up some at 32.0, 32.1, 32.2 for testing. Set aside the primer test and going to run seating again from .010 off into hard jam with a slightly less load.

I had been taught to 1/ make powder changes in 0.5 grain intervals 2/ seating depth changes 0.005" increments.

 

[Lefty Trigger]

I had been taught to 1/ make powder changes in 0.5 grain intervals 2/ seating depth changes 0.005" increments.

I started out with .5 grain steps and narrowed it down then went to .3 grain steps in the target pictured. Out of those loads the 32.0 and 32.3 had real similar groups and close velocity. Next step is .1 grain to make sure I'm in the middle of a node.
I thought I had the seating dialed in as the best groups were .015 off and .018 off but I never did go "into" the lands just touching. Going to retest that before anything else.

 

[Lefty Trigger]

Did a seating depth test from .010 off to .015 jam. Backed the load down a little and everything else the same. Shot at 200 yards and today there was hardly a breeze blowing. Now my original seating test was from lands to .040 off and .015 and .018 gave the best groups so I picked the .015 as my load point. The test today did yield some interesting results. The .015 jam was the tightest group in the test however it's still pretty close to my .015-.018 results, I think?

Forgot to put it on the target but the left group is .570 and the right group is .470

 

[Dusty Stevens]

Youll be lots happier with the jam over a jump