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Hunting
Long Range Hunting & Shooting
338-416 Rigby Improved
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<blockquote data-quote="Long Time Long Ranger" data-source="post: 175165" data-attributes="member: 505"><p>Thanks for the help. I'm starting another project and just trying to get the most case capacity out of a non-belted case. The Rigby case is about the largest I could find without a belt that I could easily get brass for. I thought if I could push the shoulder out a bit to reduce that long rigby neck I might get what I was looking for. I understand bringing that 416 down to 338 is a chore. I built my first 338-378 in the late 70's for long range elk and now have 5 or so of them. Just trying something new that I didn't have. I like headspacing off the shoulder on the big guns. I did a lot of stuff with that ultramag case when it first came out several years back and everything off it turned out super accurate. I really liked working with the non-belted case. I never heard of the Kahn. Will the 35 degree shoulder get an extra couple of grains of powder in there? The reason I ask is my favorite accuracy load for light 200 grain bullets is 132 grains of H-870 which is a chore to get in the case but shoots great. Shoots extremely flat at 3600 fps and just flattens game out to 600-700 yards. If I'm shooting beyond that I use the 300 matchkings. I have a 378 wby action and a 338 Lapua Sako action just sitting there right now. Just looking to experiment with something else.</p></blockquote><p></p>
[QUOTE="Long Time Long Ranger, post: 175165, member: 505"] Thanks for the help. I'm starting another project and just trying to get the most case capacity out of a non-belted case. The Rigby case is about the largest I could find without a belt that I could easily get brass for. I thought if I could push the shoulder out a bit to reduce that long rigby neck I might get what I was looking for. I understand bringing that 416 down to 338 is a chore. I built my first 338-378 in the late 70's for long range elk and now have 5 or so of them. Just trying something new that I didn't have. I like headspacing off the shoulder on the big guns. I did a lot of stuff with that ultramag case when it first came out several years back and everything off it turned out super accurate. I really liked working with the non-belted case. I never heard of the Kahn. Will the 35 degree shoulder get an extra couple of grains of powder in there? The reason I ask is my favorite accuracy load for light 200 grain bullets is 132 grains of H-870 which is a chore to get in the case but shoots great. Shoots extremely flat at 3600 fps and just flattens game out to 600-700 yards. If I'm shooting beyond that I use the 300 matchkings. I have a 378 wby action and a 338 Lapua Sako action just sitting there right now. Just looking to experiment with something else. [/QUOTE]
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338-416 Rigby Improved
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