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Michigan straight wall cartridge
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<blockquote data-quote="Kiwi Greg" data-source="post: 1121907" data-attributes="member: 13456"><p>Just to clarify the 450 Bushmaster factory loads are reasonably low pressure to work in a AR15 platform.</p><p> </p><p>If you hand load for a bolt action you can easily get more velocity.</p><p> </p><p>My 12" barrelled bolt actions could easily achieve 23-2350 fps with hand loads using the 250 FTX.</p><p> </p><p>Judging by the size of the flame out of the muzzle if you had a 20-22" barrelled bolt action I'm sure the velocity would be much greater.</p><p> </p><p>Even though the 450 BM is shorter than the 45 Raptor as it is modelled on the 284 case with its rebated rim it possibly has as much or more internal capacity as the Raptor.</p><p> </p><p>It too uses the standard 308 bolt face & will work in the Ex 308 family Bolt actions that I have used, Rem 700, Kimber & T3 Tikka.</p><p> </p><p>Magazine feeding is better with the FTX type projectiles rather than the big flat nose pistol ones.</p><p> </p><p>I must build a 450 Bolt Action with a decent length barrel one day <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin :D" loading="lazy" data-shortname=":D" /></p></blockquote><p></p>
[QUOTE="Kiwi Greg, post: 1121907, member: 13456"] Just to clarify the 450 Bushmaster factory loads are reasonably low pressure to work in a AR15 platform. If you hand load for a bolt action you can easily get more velocity. My 12" barrelled bolt actions could easily achieve 23-2350 fps with hand loads using the 250 FTX. Judging by the size of the flame out of the muzzle if you had a 20-22" barrelled bolt action I'm sure the velocity would be much greater. Even though the 450 BM is shorter than the 45 Raptor as it is modelled on the 284 case with its rebated rim it possibly has as much or more internal capacity as the Raptor. It too uses the standard 308 bolt face & will work in the Ex 308 family Bolt actions that I have used, Rem 700, Kimber & T3 Tikka. Magazine feeding is better with the FTX type projectiles rather than the big flat nose pistol ones. I must build a 450 Bolt Action with a decent length barrel one day :D [/QUOTE]
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