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338-378 range report
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<blockquote data-quote="el matador" data-source="post: 1297623" data-attributes="member: 12193"><p>I made it out to the range again today. The 200 yard range was closed due to recent heavy rains so I was stuck shooting at 100. Today I was hoping to find accuracy with my 117 to 118 grain loads of RL33 with the 300 grain Bergers. </p><p></p><p>117.0 RL33 shot into about 1.5", Avg velocity 2960, ES 24</p><p>117.5 RL33 shot into .920", Avg velocity 2971, ES 38 </p><p>118.0 RL33 shot into .725", Avg velocity 2982, ES 18</p><p></p><p>I've heard that these big slugs take a while to settle down and 100 yard results may not tell the whole story. I'm seeing good enough accuracy that I'll continue to fine tune this load and test it at 300 yards. I'd also like to shoot on a warm day to see if I see any pressure signs. I thought I saw a couple of very faint ejector marks at 118.0 grains. Something else: The 117.5 and 118.0 groups went into the exact same spot. The 118.0 group literally fits right inside the 117.5 group. </p><p></p><p>I also tested some of the Hornady 285 ELD Match bullets today. I shot groups from 115 to 118 grains:</p><p></p><p>115.0 RL33: Pretty tight left to right with almost 2" of vertical. Avg velocity 2948, ES 38</p><p>116.0 RL33: Vertical string 1.75". Avg velocity 2966, ES 38</p><p>117.0 RL33: .75" horizontal, 1.9" vertical. Velocity: 3022, 2995, 3000</p><p>118.0 RL33: .25" horizontal, .650 vertical. Velocity: 3023, 3000, 3031</p><p></p><p>Interesting that the last 2 groups had near identical velocity. I'm getting a higher ES than I expected and I'm not sure why. The 118.0 group was about as tight as this gun has shot so I'm very happy with it despite the ES of 31. I'll test another batch of these, focusing around 118 grains and maybe varying seating depth a bit. The vertical spread correlated very closely to the changes in velocity. If I can get the ES down with the Hornadys they might shoot extremely well. </p><p></p><p>All of my loads today used HBN coated bullets. Both of the bullets I tested liked the 118 grain charge of RL33. I'm going to dedicate about 25 of my brass to these RL33 tests and see how many firings I can get before I lose the primer pockets.</p></blockquote><p></p>
[QUOTE="el matador, post: 1297623, member: 12193"] I made it out to the range again today. The 200 yard range was closed due to recent heavy rains so I was stuck shooting at 100. Today I was hoping to find accuracy with my 117 to 118 grain loads of RL33 with the 300 grain Bergers. 117.0 RL33 shot into about 1.5", Avg velocity 2960, ES 24 117.5 RL33 shot into .920", Avg velocity 2971, ES 38 118.0 RL33 shot into .725", Avg velocity 2982, ES 18 I've heard that these big slugs take a while to settle down and 100 yard results may not tell the whole story. I'm seeing good enough accuracy that I'll continue to fine tune this load and test it at 300 yards. I'd also like to shoot on a warm day to see if I see any pressure signs. I thought I saw a couple of very faint ejector marks at 118.0 grains. Something else: The 117.5 and 118.0 groups went into the exact same spot. The 118.0 group literally fits right inside the 117.5 group. I also tested some of the Hornady 285 ELD Match bullets today. I shot groups from 115 to 118 grains: 115.0 RL33: Pretty tight left to right with almost 2" of vertical. Avg velocity 2948, ES 38 116.0 RL33: Vertical string 1.75". Avg velocity 2966, ES 38 117.0 RL33: .75" horizontal, 1.9" vertical. Velocity: 3022, 2995, 3000 118.0 RL33: .25" horizontal, .650 vertical. Velocity: 3023, 3000, 3031 Interesting that the last 2 groups had near identical velocity. I'm getting a higher ES than I expected and I'm not sure why. The 118.0 group was about as tight as this gun has shot so I'm very happy with it despite the ES of 31. I'll test another batch of these, focusing around 118 grains and maybe varying seating depth a bit. The vertical spread correlated very closely to the changes in velocity. If I can get the ES down with the Hornadys they might shoot extremely well. All of my loads today used HBN coated bullets. Both of the bullets I tested liked the 118 grain charge of RL33. I'm going to dedicate about 25 of my brass to these RL33 tests and see how many firings I can get before I lose the primer pockets. [/QUOTE]
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