Originally Posted by dla
Originally Posted by bfrshooter
The same holds true with the .44 mag and .45 Colt, LP mag primers are not as good as standard primers. Even Federal is loading mag loads with the 150 primer.
I do not go to the LP mag until the .475 and up.


Not sure what you mean by "good". According to my chronograph, mag primers greatly reduce the Extreme Spread when using H110, W296, Enforcer and LilGun in 44 mag. I take the lower ES to mean that ignition and combustion are more consistent.

I can list 100 things as to why ES and SD is bad in a revolver.
I have been testing the primers in the .44 since the early 70's and used standard primers with 296 for IHMSA, won Ohio state with 79 out of 80. All of my hunting has been with standard primers. Any weather. The chrono never gets used for working loads, it is useless.
These are average groups with my old SBH that is close to 62,000 rounds. 50 yards and I shot the can at 100. Hit the rail so I aimed higher for the last shot.
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Here is a group at 200 yards while doing a drop test. Different boolit. [Linked Image]
Then the .45 Colt Vaquero at 50 yards.
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There is no way I ever did this with a mag primer.