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Double Rifles, Single Shots & Combinations >> Building Double Rifles & Gunsmithing

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Jeffeosso
.275 member

Reged: 11/01/03
Posts: 52
Loc: Porter, Texas

Re: Here we go -- Huglu 12ga to 45/120 Nitro [Re: peter]
#131917 - 09/04/09 08:33 PM

Ren
i don't know how much lower, but the rule of thumb for going BIGGER is you will gain velocity at the rate of 1/4 of the percentage gain in capacity, at the same pressure. Do the math backwards, and its very intriging.

i don't care for plated brass, and only use norma for 45/120, due to construction and capacity

you are welcome to your 45/70, I have a couple. However, THIS build is about the 45/120 on MY huglu ... i wouldn't have bothered with the work, as my spartan does 45/70 work just fine

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Why do Scots men wear kilts? Because it's far easier to run with your kilt up than your pants down

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Al_in_Mi
.224 member

Reged: 08/01/06
Posts: 26
Loc: Michigan

Re: Here we go -- Huglu 12ga to 45/120 Nitro [Re: Jeffeosso]
#133558 - 26/04/09 05:55 PM

Jeffe, any new updates?

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REN3
.224 member

Reged: 30/04/08
Posts: 31
Loc: Colorado, USA

Re: Here we go -- Huglu 12ga to 45/120 Nitro [Re: Al_in_Mi]
#133611 - 27/04/09 06:37 AM

Jeffe, I do not mean to change the subject from the 45-120, but rather I am just trying to gain some knowledge. I have no idea if my Italian double could be safely reamed out to 45-90 or 120, but I would certainly consider it just for the bigger case. Would there be any ballistic advantage in going with the larger case with a 350gr. bullet? Since I am using Varget powder now with a pressure lavel of only 28K at 60 grains based on Varget's published data, would I be able to significantly increase velocity, or would I just get lower pressure? Also do you have any idea on the minimum chamber wall thickness at the case mouth/bullet seating area of the chamber. Would lower pressure have any effect on felt recoil? Thanks. Bob N.

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