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I would really like some input about selecting the right twist rate for a 450 marlin I'm having built. I have a P14 action that I want to have turned into a sporter. I believe Marlin uses a 1:20 twist rate for their lever action rifles in this cartridge. Is that the best twist rate for 350-400 grain bullets? <img src="/ubbthreads/images/graemlins/help.gif" alt="" />
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Campfire Kahuna
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Campfire Kahuna
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I would contact Charlie Sisk. He is a big fan of bolt-action .450's and has built several.
MD
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Mule Deer,
Thanks for the information. I'll contact him and see what he can tell me.
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Personally, given the weight of the P14 action, I'd go a straight 458Win and then reload it back to 450Marlin velocities. On a sporterised M17 I have, I've considered the 450Marlin and 458American but the 458WM just makes the most sense and seems most practical. If I was building a lighter weight sporter, then yes maybe I'd build a 458American ... but particularly in Australia, I'm wary of commiting to 450Marlin brass from one manufacturer that I can't make from something else. Cheers... Con
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Con,
You do make a good point. Actually, I did consider the 458 WM for this project, but have been leaning towards the 450. I may reconsider the cartridge selection.
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Steyr was showing a 450 Marlin SBS at the SHOT Show. Drop them a line and see if it's ready for production.
You can't miss fast enough to win!
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Campfire Kahuna
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It's easier to make a big cartridge shoot soft than a little one shoot big.
I am..........disturbed.
Concerning the difference between man and the jackass: some observers hold that there isn't any. But this wrongs the jackass. -Twain
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Campfire Kahuna
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Campfire Kahuna
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Actually, Charlie reports very little difference in the handloaded .450 and .458, and he has pressure-testing equipment. It just depends on what you want. I'd still talk to him, as he's built several BA .450's and knows what's up.
MD
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I'll definitely give him a call before making the final decision on the cartridge choice of this project. I could make a case for either one.
Last edited by TNrifleman; 04/17/06.
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Charlie reports very little difference in the handloaded .450 and .458 I'd love a bit more info on this please MD. Don't follow you yet.
Model 600s in 308 Win and 6mm Rem, nuther one rebarreled to 22-250, matched pair of Model 660's in 6.5mm Rem Mag and 350 Rem Mag, NEED a 660 in 222.
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He hasn't found much difference in muzzle velocity when both cartridges are loaded to the same pressures.
MD
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Wow. The little 450 is even more of a thumper than I thought. To be able to fit that kind of power into a handy short action is strangely attractive. Thanks.
Model 600s in 308 Win and 6mm Rem, nuther one rebarreled to 22-250, matched pair of Model 660's in 6.5mm Rem Mag and 350 Rem Mag, NEED a 660 in 222.
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