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Heavy 45/70 Loads

Posted: 26 Apr 2017 04:15
by bigpete
So I've just ordered a new Rossi Rio Grande in 45/70 from my local gunship here in South Australia. One play with it and I was hooked ! Smooth as silk lever cycling,decent trigger pull,and it fits me like a glove !
Now half the reason I decided to buy it was because I want a backup gun for a muzzleloader/longbow water buffalo hunt I'm going on. So I'm planning on reloading with very heavy projectiles. I have on offer a Cast Bullet Engineering 570gn .458 bullet mold I'd like to try,and I'm just curious if anyone here has tried loading such a heavy bullet in their Rio Grande at all ? And is there any problems with them that I should look out for ?
Cheers,Pete

Re: Heavy 45/70 Loads

Posted: 26 Apr 2017 06:57
by Ranch Dog
As long as the bullet was designed with a leveraction cartridge overall length considerations in mind, there would be any issues with it. Usually, you can tell by the nose, it cannot be much more than .45" (11.43mm) long. Nose profile plays into this a bit but the cartridge needs to make it up the carrier and into the chamber at a pretty good angle.

I've used the Beartooth 525-grain Pile Driver in my RG4570. At .458" it cycled very well and was very accurate.

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Re: Heavy 45/70 Loads

Posted: 26 Apr 2017 07:56
by GRV01
Ranch Dog wrote:
I've used the Beartooth 525-grain Pile Driver in my RG4570. At .458" it cycled very well and was very accurate.

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Now thats big medicine!

Re: Heavy 45/70 Loads

Posted: 26 Apr 2017 17:19
by GasGuzzler
That would run me out of alloy quickly. I don't have 4K#

Re: Heavy 45/70 Loads

Posted: 28 Apr 2017 09:05
by bigpete
Well,the point is moot anyway. Can't get the damn thing coz they're not made anymore. Just my luck