Ruger No.1 458 WM Loads

sixgunner357

sixgunner357

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As the title says I’m looking for information from anyone who has tried the 350 TSX or 300 TTSX. I’d also like to know if the COAL can be extended with the single shot. I’m interested in using the rifle for Moose not charging Elephant. Thanks for any and all advice.
 
I had the same rifle, traded it in for a No.1-S .45/70 with the 22" "C" barrel... just because it is a lighter trimmer package. My load for the .458 was a 350 SP over 70.0 grains of H4198... it is a good load, snaps a bit, but that's what we like... ain't it!
 
sixgunner357 said:
... I’d also like to know if the COAL can be extended with the single shot. ...
Click to expand...

If you are going away from the bullet maker's recommended Cartridges Over All Length (COAL), and there might be good reasons to do that, then I expect it is very important to first find where the lands are in your rifle - most reloading manuals tell you various ways to do that - and then make sure that you are backed off from that length. I don't think you want to have a bullet jammed into the lands, using jacketed or "mono" bullets and "healthy" loads. Looking at SAAMI drawings for the 458 Win Mag chamber, maybe not even be possible to get to the lands with the rear end of bullet still in the case mouth, but something that you should investigate? There always used to be a "rule of thumb" to have the bullet at least a "caliber" deep into the brass, to create appropriate "pull" for the powder to work properly. Another aspect to consider...
 
I’ve also read about the 1 caliber seating depth into the case. I’ll have to see where the grooves of the bullet line up as I’m going to use a Lee factory crimp die.
 
I have been reloading for several rifles in several different calibers. Those factory cannelure grooves are remarkably correct for some, but pretty much "ignorable" for others. I need the round to fit the magazine - not an issue for your No. 1, then I want to be off the lands, then I want about a caliber or so seating depth - I do not think .020" or .030" one way or other actually matters. I have never crimped any center-fire jacketed rifle bullet - from 22-250 - 243 Win - 6.5x55 - 7x57 - 308 Win - 30-06 - 303 British - 8mm Mauser - 338 Win Mag - 9.3x62 - 458 Win Mag. Only exception were some cast lead bullets that the crimp groove turned out to be in exact appropriate location, and that rifle had a magazine - those got a roll type crimp into the crimping groove. I do use a Lee Factory Crimp Die to "smooth out" the mouths of some 9.3x57 cases that were opened up with an "M" type die of my own making - did not get it completely correct - leaves an "edge", even after the cast bullet is seated.
 
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