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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
338 Sherman Build (This Is My Boomstick!)
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<blockquote data-quote="benchracer" data-source="post: 1330150" data-attributes="member: 22069"><p>Though my Saturday shooting session was cut short by a thunderstorm, I did manage to fire form enough Norma brass to perform a quick pressure runup with RL-26, Berger 250 EH's, and three brands of magnum primers. I determined that the maximum charge of RL-26 that would fit in the case was 72.0 grains. I backed down to 68.0 grains and loaded five rounds for test, at one grain increments, up to 72.0 grains, with each of the three magnum primers tested: CCI, Winchester, and Federal 215 Match.</p><p></p><p>The batch loaded with CCI primers exhibited erratic behavior. The initial round clocked in the low 2700's, velocity peaked @ 2785 on the third round, and the velocity decreased with the fourth and fifth rounds.</p><p></p><p>Things got more interesting with the Winchester primers. The first round clocked 2729 and the last round clocked 2852, with a faint ejector mark.</p><p></p><p>The Federal 215M's performed similarly, with the first round measuring 2735 and the last round measuring 2858, again with a faint ejector mark.</p><p></p><p>It looks like the formed PRVI cases will hold an additional 1.5 grains of RL-26. I plan to test them to their max capacity with the Winchester and Federal primers.</p></blockquote><p></p>
[QUOTE="benchracer, post: 1330150, member: 22069"] Though my Saturday shooting session was cut short by a thunderstorm, I did manage to fire form enough Norma brass to perform a quick pressure runup with RL-26, Berger 250 EH's, and three brands of magnum primers. I determined that the maximum charge of RL-26 that would fit in the case was 72.0 grains. I backed down to 68.0 grains and loaded five rounds for test, at one grain increments, up to 72.0 grains, with each of the three magnum primers tested: CCI, Winchester, and Federal 215 Match. The batch loaded with CCI primers exhibited erratic behavior. The initial round clocked in the low 2700's, velocity peaked @ 2785 on the third round, and the velocity decreased with the fourth and fifth rounds. Things got more interesting with the Winchester primers. The first round clocked 2729 and the last round clocked 2852, with a faint ejector mark. The Federal 215M's performed similarly, with the first round measuring 2735 and the last round measuring 2858, again with a faint ejector mark. It looks like the formed PRVI cases will hold an additional 1.5 grains of RL-26. I plan to test them to their max capacity with the Winchester and Federal primers. [/QUOTE]
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338 Sherman Build (This Is My Boomstick!)
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