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Reloading .303 British : Effect of Primer Selection on Muzzle Velocity

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Author: britrifles
Subject: Effect of Primer Selection on Muzzle Velocity
Posted: January 27 2025 at 8:07am

I've plotted up the Horizontal POI spreads vs muzzle velocity.  This confirms my suspicion that POI shifts right as MV increases.  

But I now see that the 3.050 inch Cartridge Overall Length produced the smallest group in both horizontal and vertical spreads.  I suspect because of neck tension on the bullet, or this bullet does better with more jump to the lands.  

I'll add the plot to this thread when I get home. 

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