Round Bullets in Whitworth-polygonal bore

TheDoubleD

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I am getting ready to load ammo for my Westley Richard 1871 Express rifle in 500 No.2 Express. The bore is Whitworth rifled. If I can make this gun shoot I hope to use it on my bear hunt to Manitoba this September.

I am concerned about the shooting round bullets in the polygonal Whitworth bore. I am asking for your opinions on this.

The bullets I have available are as follows.

1. CBE .510 440 mould. This seems the safest option shooting malleable round bullets in a polygonal bore.

2. Woodleigh .510 440 grain RN SN. These bullets have a thinner jacket designed for Black powder express rifles. I would think they should be fine in a Whitworth bore. I have 55 of these bullets.

3. Barnes Original .510 450 grain. An unknown to me.


Would like to hear your opinions on these bullets suitability in a polygonal bore.

FWIW, i will be cross posting this question else where to get additional opinions.
 
Here is my bore. 8 groove.

whitworth bore02-X2.jpg
 
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I would use cast as that’s what it was designed for, and I like cast. You may get blowby with jacketed or damage the throat, it’s a 150 year old gun, treat it gently
Gumpy
 
I would use hard cast or paper patched bullets in that classic old rifle.
 
I have a box or 440 gr cast that I use in 50/70 and 50/90 rifles I could send you to try.
 
@TheDoubleD where 'bouts in Manitoba are you heading?
I've been up there a few times for bear
 
It’s definitely designed for long cast bullets. Look at the twist on that barrel, that’s no round ball gun!!!
 

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steve white wrote on Todd Fall's profile.
I'll take the 375 bullets. I'm not a techie, so I can do USPS money order or Paypal?
My telephone is [redacted] Thanks, S.
pajarito wrote on Altitude sickness's profile.
is the parker shotgun still available?
Waterbuck hunt from this past week!

 
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