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Actually no I don't. I seat both the 80gr A-Max and 75 gr A-Max to the same length determined on the length measured with a Hornady OAL gauge, but haven't actually measured the OAL of the finished...

I've never measured the muzzle velocity so can't say.
Electronic targets give an estimate of terminal velocity which can be used to judge consistency of load.

I've used e-target terminal...

As I wrote above My son shoots a Savage 223, 26" barrel 1:7 twist, Model 12, straight from the shop with addition of scope & rail + bipod.
When we can get them we will use 80 gr A-Max, trying 75 gr...

Accuracy with the 80gr is very good, competitive in FTR against other shooters using 308s.

Son shot a perfect score 60/60 last month at 500 yards with the 80 gr. Haven't used the 75 gr enough to...

What is the barrel length and twist rate of your 223?

My son shoots a Savage 223, 26" barrel 1:7 twist in FTR competition.
We prefer to shoot 80 gr A-Max but these aren't available at the...