need some quick load data

[918v]

Winchester brass has a water capacity over 58 grains in most chambers. So your 56.5 number is throwing things off.

Other than using water with a medicine dropper from a just fired case.I don't know of any other method.

Scale is a gem pro 250 and the scale reads zero before I start. Using 5 fired cases for each measurement then averaging them.

I think my measurements are spot on for what my brass is and what my chamber is. Maybe you have much lighter brass then I do. My brass also weighs 158-159gr per batch. The bullet is 30715 B

Measuring a fired case from my chamber, I pour from the faucet, then I tap the case against a hard surface to dislodge air bubles and to make sure the water migrates into the primer pocket. I then top it off leaving a convex meniscus.

My cases weigh from 156-160grs. I don't trim. They're about 2.020" long.

Are you measuring sized cases?

 

[eric32]

No recently fired cases

 

[918v]

What is your fired base, shoulder, and neck diameter?

 

[918v]

Hello, u still there?

 

[eric32]

Sorry I am not on your timeline, I do have other things to do . The reamer that I have is a JGS 3655, not at home to measure.

 

[seymour fish]

We ALL HAVE OTHER THINGS TO DO. Jeez !!!!!!!!!!!!!!!!!!

 

[eric32]

Ain't that the truth

 

[eric32]

Finally got around to shoot did some pressure and velocity testing

4064- CCI 200 -win Brass-hornady 178 bthp moly- winchester brass oal 2.225 ogive

All brass looks great no primer issues what so ever. I think I will test in the flat side of the bell curve and stay between 43.5 and 43.7 and just use 43.6 and do some seating depth testing
43.0 gr
2720 /2695

43.3
2745/2767

43.5
2756/2752

43.7
2757/2751

44.0
2827/2802