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A10ACN
.300 member

Reged: 30/01/05
Posts: 198
Loc: USA

450 BPE vs 450 NE
#121147 - 14/12/08 10:19 AM

What are the twist rates for 450BPE/NFB and 450 Nitro barrels?? I'd appreciate any industry specs as well as anyone's personal rifle/barrel/load specs on their rifles.

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ChrisPer
.300 member

Reged: 12/05/08
Posts: 235
Loc: Australia

Re: 450 BPE vs 450 NE [Re: A10ACN]
#121148 - 14/12/08 11:00 AM

My 500/450 No 1 Express 2 3/4" is one turn in 40".

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DarylS
.700 member

Reged: 10/08/05
Posts: 26646
Loc: Beautiful British Columbia, Ca...

Re: 450 BPE vs 450 NE [Re: ChrisPer]
#121222 - 15/12/08 05:41 AM

I'd expect the BPE's to have substancially slower twists than a NE. This is due to the light-for-calibre black powder bullets compared to normal heavier for calibre nitro-express loads.
Seems to me I read the .450NE had somewhere around an 18" to 20" twist to stabilitze it's 480gr. bullet.
The .450 BPE normal 1890's factory loaded bullets ran 270gr. and had a twist-rate of between 40" and 60". The quicker of the two twists might stabilize a bullet up to about 360gr. weight, which was used by some African hunters.

--------------------
Daryl

"a gun without hammers is like a Spaniel without ears" King George V

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purdy
.224 member

Reged: 15/12/08
Posts: 1
Loc: MT, USA

Re: 450 BPE vs 450 NE [Re: DarylS]
#121239 - 15/12/08 10:12 AM

My Purdy 450 BPE made in 1895 has aproximately 1 in 28" twist. It stabilizes 350-360gr bullets just fine. These BP guns weren't made for heavier bullets.

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CptCurl
.450 member

Reged: 01/05/04
Posts: 5275
Loc: Fincastle, Botetourt County, V...

Re: 450 BPE vs 450 NE [Re: purdy]
#121251 - 15/12/08 01:29 PM

Hey purdy,

Welcome to the forums.

You should post photos of your Purdey .450 on the DR Photo Archive Forum as we would love to see it. I have a Purdey .500 BPE made in 1894. It would be great to see yours.

Curl

--------------------
RoscoeStephenson.com

YOUR DOUBLE RIFLE IS YOUR BEST FRIEND.

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