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converting P-14
 Moderated by: Poacher, DesertMarine
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 Posted: Thu Jan 12th, 2017 06:20 PM
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malingering marv
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I have a complete P-14 Enfield action in good condition. Can it be converted to .450 marlin with out to much difficulty? Would the feed rails need to be modified? I think the bolt face would work with out modification. Also what is optimum barrel length for the .450? What weight rifle should I look to build? I know I'm asking a lot but I'm looking for feedback from Guys who have "been that done there".



 Posted: Tue Jan 17th, 2017 03:03 PM
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swampshooter

 

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IMHO it would be much easier to convert your P-14 into a rimless cased big bore.



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 Posted: Tue Jan 17th, 2017 04:13 PM
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Big Joe
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I think the P14 is set up to shoot the 303 round. The P17 is the 30-06 model. But to answer the question will the feed rails need modified, yes I think, there is a large difference in the two cartridges.



 Posted: Tue Jan 17th, 2017 04:37 PM
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Charley



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I'm channeling Plainsman and his "no such thing as a 45 LONG Colt", only doing the Enfield. No such thing as a P17. The P14 is English designation, P standing for "Pattern". The US used/uses the designation "Model", using M1917, M1903, M14, M16, and so on.



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 Posted: Wed Jan 18th, 2017 01:54 AM
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Rockydog



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swampshooter wrote:
IMHO it would be much easier to convert your P-14 into a rimless cased big bore.

A 450 Marlin is a rimless case, but it is a belted case. Essentially it's a .458 X 2" American with a wider belt.

The .458 X 2 is simply a shortened .458 Win Mag. There are some concerns that a .458 X 2,utilizing deep seated bullets, could be loaded into 300 Win mag and fired with disastrous results. .458 bullets just don't seem to swage down well in a .308 barrel. This is not helped by the fact that some folks make .458 X 2 out of most any belted brass. If It says .300 win mag on the barrel and on the case head we must be good to go, heh?

In an effort to prevent this from happening the .450 Marlin is .1" longer than the .458 x 2 and has a wider belt by about .050. Not bigger around, just taller so that the bolt won't close.

IIRC this action has been converted to .300 H&H mags and cartridges derived from the .300 H&H. It certainly should handle the .450 Marlin. RD

The .450 Marlin alongside a .458 Win mag. Note the width of the two belts.

Attachment: .450 Marlin.jpg (Downloaded 13 times)



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 Posted: Wed Jan 18th, 2017 10:58 PM
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swampshooter

 

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My mistake Rocky, thanks for pointing it out.



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