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Shooting & Reloading - Mausers, Big Bores and others >> Big Bore Rifles

Judson
.300 member

Reged: 21/09/05
Posts: 192
Loc: St. Albans Maine U.S.A.

Re: 450/400 = 45-70? (!)
15/05/06 11:21 AM

This 45-70 gambit I deal with in my shop all the time. The factory loads are very low pressure so hopefully a person will not blow up their trap door Springfield and sue the ammo maker. However this hole thing comer down to basic phyisics. To push a givin bullet weight/ diameter at a spicific velosity you need a certian pressure. Yes you can push a 500 grain bullet in the 45/70 to .458 Winchester velosities, even higher but your pressures go up accordingly. A 45/70 loaded to Lazzeroni pressures will beat out the .458 but 70,000 PSI is a bit much don't you think. The bottom line on this is that it takes a given pressure to push a given weight bullet at a given speed, the only way around this is to increase case capisity so we burn more powder at lower pressures to reach that bullet speed. This is how the .450 # 2 NE can reach 2150 with a 480n grain bullet with only 25,000 C.U.P or less. On the other hand you have to burn more powder to get there.

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It is the small calibers that are the biggest bores.

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Subject	Posted by	Posted on
450/400 = 45-70? (!)	JRiekers	14/05/06 06:55 AM
Re: 450/400 = 45-70? (!)	JRiekers	15/05/06 01:21 AM
Re: 450/400 = 45-70? (!)	NitroX	15/05/06 02:20 AM
Re: 450/400 = 45-70? (!)	JRiekers	15/05/06 04:11 AM
Re: 450/400 = 45-70? (!)	NitroX	15/05/06 11:40 AM
Re: 450/400 = 45-70? (!)	Judson	15/05/06 03:45 PM
Re: 450/400 = 45-70? (!)	DUGABOY1	19/05/06 10:57 AM
Re: 450/400 = 45-70? (!)	45s_save_lives	23/05/06 06:19 AM
Re: 450/400 = 45-70? (!)	NitroX	23/05/06 06:31 PM
Re: 450/400 = 45-70? (!)	bulldog563	15/05/06 05:46 AM
Re: 450/400 = 45-70? (!)	Judson	15/05/06 11:21 AM
Re: 450/400 = 45-70? (!)	400NitroExpress	14/05/06 08:27 AM
Re: 450/400 = 45-70? (!)	AzGuy	14/05/06 10:05 AM
Re: 450/400 = 45-70? (!)	mikeh416Rigby	14/05/06 09:42 PM
Re: 450/400 = 45-70? (!)	NitroX	15/05/06 01:18 AM
Re: 450/400 = 45-70? (!)	mikeh416Rigby	14/05/06 01:14 PM
Re: 450/400 = 45-70? (!)	NitroX	14/05/06 05:34 PM
Re: 450/400 = 45-70? (!)	Ndumo	14/05/06 06:00 PM
Re: 450/400 = 45-70? (!)	mikeh416Rigby	14/05/06 09:29 PM
Re: 450/400 = 45-70? (!)	500Nitro	14/05/06 07:43 AM

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