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375 RUM and the 260 Accubond...

 
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  #22  
Old 11-30-2013, 03:05 PM
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Join Date: Mar 2011
Location: North Dakota
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Re: 375 RUM and the 260 Accubond...

Anyone use Vit n560 in there 375?
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  #23  
Old 11-30-2013, 03:17 PM
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Re: 375 RUM and the 260 Accubond...

Quote:
Originally Posted by Doublezranch View Post
21 inch barrel? Goodness!!! Did you have to put 2 muzzle breaks on her to calm the mules kick?

Thanks Lefty, 250 is another great choice. I'm going to give the 260 accubonds and the 320 CEB's a whirl. It's going to be a "blast" for sure!!
No brakes = I installed a magnum grind to fit Kick-eez recoil pad.

When the scope is off I install an XS Sights tall Weaver backup ghost ring sight my loads for this are 350gr TSX @ 2440fps.

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  #24  
Old 11-30-2013, 03:23 PM
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Re: 375 RUM and the 260 Accubond...

That's gorgeous. Looks like you have everything you need.

Awesome....
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  #25  
Old 11-30-2013, 03:52 PM
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Re: 375 RUM and the 260 Accubond...

I spent 7 years working mostly solo as a self-employed free miner (prospector) in Central /Northern British Columbia, Canada.

I legally carried handguns most powerful was my Ruger 4.25" barreled SRH in 454 Casull loaded with 405gr WLNGC's @ 1330fps long guns I started by carrying Rem 870 12 gauge shotguns then a Marlin 1895GS 45-70 but all of these guns lacked distance when it came to hunting season.

So I put this 375RUM together to do double duty as a defence and long range hunting combo.

With the VX3 4.5-14X40mm B&C reticle scope mounted with a 200 yard zero the second B&C reticle line down is zeroed at 460 yards when I do my part I have repeatedly put 3 260gr Accubonds into 6" at that range.

I shot my 24 3/16" B&C interior grizzly @ 230 - 250 yards with a 300gr Partition @ 2800fps.

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  #26  
Old 12-01-2013, 11:52 PM
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Join Date: Jul 2012
Location: Washington State
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Re: 375 RUM and the 260 Accubond...

Moki

Nice critter!!!

If anyone has experience with VihtaVuori's N5XX series powders in this caliber I too would be interested. N540 orN550 is better suited to the 375 Ruger but N560 is their slowest for the big mags.

When the N5XX series first arrived in August of 1995 they were marketed as a "high energy" powder. I assume from the burn rates and charge densities that they use less powder and occupy less space. I have run out of room in the 375 Ruger using 300gr bullets over 80gr of 4350 but would like to stay with 4350 burn rates in this weight bullet. Hence the search for high density (re: high energy) powders.

If anyone has some load data please post to this thread.

Thanks!!!
Kennibear
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  #27  
Old 12-03-2013, 10:51 PM
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Re: 375 RUM and the 260 Accubond...

RL17 has the same basic burn rate as IMR4350

When RL17 was first released I was told to use IMR4350 data
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  #28  
Old 12-04-2013, 02:41 AM
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Join Date: Jul 2012
Location: Washington State
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Re: 375 RUM and the 260 Accubond...

Thanks Moki!

Already trying RL19 w/300gr bullets.

Did some research on the Lapua website:
Products - Lapua

They don't list either the 375 RUM or the 375 Ruger but the 338LM and others do shed some light. The N5XX correspond to the same burning rate as the N1XX series, that is N560=N160 or N540=N140 in overall powder speed, fast/slow. The N5XX contain nitroglycerine (glycerol) to boost energy and seems to increase velocities over single based N1XX powders by about 100fps. You can interpolate a load from another caliber if you can find a similar weight of a known powder. For instance if you are using 96grs of 4350 and another cartridge/load of the same pressure level also uses 96grs of 4350 then the N1XX/N5XX load for the second cartridge would be close to what you could use, -10% to start and building up from there.

Lapua's website lists N570 which might be just the ticket in 375 RUM. I have never seen it on this side of the pond but I am keeping a sharp eye out for it now.

Hope you guys can use this info.
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