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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Stuck on caliber decision - input appreciated
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<blockquote data-quote="geocodyrgia" data-source="post: 1283849" data-attributes="member: 98212"><p>as an update on this, from the OAL concerns brought up (very valid and thank you for bringing them up) I started looking at the 284 and it's variants (shehane, etc). I know it's been getting a great following around the F Class guys and thought it could be a great way of solving my OAL concerns. </p><p></p><p>From what I've seen 180 Berger are at about 3.1-3.2 OAL and able to get about 2750-2850 out of the UNimproved 284 cases, sometimes with barrels as short as 26". My key is trying to get a 180gr 7mm or 170gr .277 bullet to 2800 fps in whatever cartridge I choose. </p><p></p><p>I also took the chance to lay out some of the .277 170 gr Berger's so I could see what they'd look like with the top of the boat tail at the bottom of the neck and they came out to 3.4".......just fitting my magazine.</p><p></p><p>So, conclusions for others that may see this thread as they work their way through a similar situation, if I go 7mm it will be an improved version (maybe the shehane as it seems the most standardized across the competition 6.5-284 guys) of the 284 with a 28" 1:8 or maybe 1:9 barrel to make sure i'm over 2800fps. If I go 270 (which truthfully is how I'm leaning) it'll be a 270ai on a 28" 1:8 barrel. </p><p></p><p>I had really considered going 280 Sherman and putting the action in a chassis or use CDI bottom metal to get the really long AI detachable magazines which would give me the room for a 3.625 OAL. If I was working off a 700 action and magazine, I think the 280 Sherman would have been the way I would have gone. Heck, I'm not even 40 yet, plenty of time down the road, right? <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink ;)" loading="lazy" data-shortname=";)" /></p></blockquote><p></p>
[QUOTE="geocodyrgia, post: 1283849, member: 98212"] as an update on this, from the OAL concerns brought up (very valid and thank you for bringing them up) I started looking at the 284 and it's variants (shehane, etc). I know it's been getting a great following around the F Class guys and thought it could be a great way of solving my OAL concerns. From what I've seen 180 Berger are at about 3.1-3.2 OAL and able to get about 2750-2850 out of the UNimproved 284 cases, sometimes with barrels as short as 26". My key is trying to get a 180gr 7mm or 170gr .277 bullet to 2800 fps in whatever cartridge I choose. I also took the chance to lay out some of the .277 170 gr Berger's so I could see what they'd look like with the top of the boat tail at the bottom of the neck and they came out to 3.4".......just fitting my magazine. So, conclusions for others that may see this thread as they work their way through a similar situation, if I go 7mm it will be an improved version (maybe the shehane as it seems the most standardized across the competition 6.5-284 guys) of the 284 with a 28" 1:8 or maybe 1:9 barrel to make sure i'm over 2800fps. If I go 270 (which truthfully is how I'm leaning) it'll be a 270ai on a 28" 1:8 barrel. I had really considered going 280 Sherman and putting the action in a chassis or use CDI bottom metal to get the really long AI detachable magazines which would give me the room for a 3.625 OAL. If I was working off a 700 action and magazine, I think the 280 Sherman would have been the way I would have gone. Heck, I'm not even 40 yet, plenty of time down the road, right? ;) [/QUOTE]
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Stuck on caliber decision - input appreciated
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