Reloading for accuracy/consistency help

[jasnt]

No sir.  I bump shoulders back .0015-.002 every loading. I used to neck size only and I did have stiff chamberings. I stopped neck sizing because I hate doing a different step every few loadings to fix what I was skipping in other loadings.  I did find in my 300wm and my first 243 barrel that if I neck sized only with a standard FL die it didn’t bump shoulders but sized the case walls enough that I didn’t have to bump shoulders every few loadings and bolt drop on chambering wasn’t near as stiff and I think that the bolt was actually pushing the shoulder back just enough because I noticed after chambering one of my hunting loads multiple times on the same round the stiffness was noticeably less.    Sounds to me like your chamber is definitely a little out of spec.    Maybe you could try what worked for me and it could help. 

[Magnum_Willys]

I have a body die that fits my chamber better but doesn't give quite the concentricity that the full length die does but I think I'll try it a bit to save overworking my brass.  I'm going to try your suggestion and see what that does.   

[Yondering]

I have a body die that fits my chamber better but doesn't give quite the concentricity that the full length die does but I think I'll try it a bit to save overworking my brass.  I'm going to try your suggestion and see what that does.

Just a suggestion - try removing the expander ball assembly from your FL sizing die, and measure if or how much brass grows just from sizing. You may be seeing a lot of the growth from the expander ball pulling too hard.

[Magnum_Willys]

I have a body die that fits my chamber better but doesn't give quite the concentricity that the full length die does but I think I'll try it a bit to save overworking my brass.  I'm going to try your suggestion and see what that does.

Just a suggestion - try removing the expander ball assembly from your FL sizing die, and measure if or how much brass grows just from sizing. You may be seeing a lot of the growth from the expander ball pulling too hard.

Good idea, but actually been using a mandrel on the one full sizer with a small neck and nothing on the full sizer with the bushing neck.

[wooltie]

Based on my limited experience-- powder type, followed by charge weight, then bullet type/weight determine which loads group well and which don't for me and my gun.

A load that works well for me is one where I see 4-5 sequential charge weights shoot moa or better at 100 yards.  Each charge pretty much groups the same. For example, I'll shoot 50-51 grains in .3 grain intervals. This tells me the load is supposedly stable across this charge range, so I pick a charge in the middle.

I wasted a ton of time and powder using 4350 and barely got anything to group. Then I switched to 4064 and saw groups in the manner I just described.  4350 grouped at max charge or higher but I didn't like primer and case signs I was seeing.

I'm going for moa or better and stability though. I'm seeing .5 moa, some rounds touching, and that more than good enough for hunting to 300 yards. I want a consistent, stable load that'll always shoot moa or better.

I just didn't see this until I switched powders.

I'm also seeing amax spread of 20 fps over 10-15 rounds.