Once optimal seating depth is found.....

[akz28]

SINCLAIR INTERNATIONAL Sinclair Chamber Length Gage

Check out SINCLAIR INTERNATIONAL Sinclair Chamber Length Gage available Online at Brownells Today and many more Case Length Gauges products are available in our Reloading Department.

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Order placed for my 6.5 cm and 6mm cm......thank you !

 

[Seymour Fish]

I found a great powder charge then seating depth combination for my MPA 6.5 Creedmoor.
The problem is that I am getting ejector marks on the brass, which I am in the process of troubleshooting.

My question is, what happens to the accuracy once I start backing off the powder load?
I know that elevation will need to be adjusted on the scope.
But I am talking about the group size. If I shoot 41.0 grains and lets say 2.207 seating depth then what happens if I go to 39 grains?
Will it affect my groups? Or can I theoretically keep the same seating depth and not have to go through that seating depth exercise again.
Again, not talking about elevation, I can adjust for that easily. Will my tight groups be affected.

Thank you in advance.

39.77

 

[salks]

Glad you got it figured out.

 

[mark5pt56]

Order placed for my 6.5 cm and 6mm cm......thank you !

Yup! make sure you drill out the primer pocket to push the gauge back out