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Joined: Sep 2005
Posts: 181
Campfire Member
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Campfire Member
Joined: Sep 2005
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I built a 6.5 Remington SAUM on a SS donor 300 SAUM. Idea being to see if I could get the same velocity and possibly performance as my old trusted 264 WM and 140 Sierra Gamekings. The barrel on the saum started off at 24" and is now 22". Velocity is 3180 and I might be able to get a bit more if I experimented with some of this new fangled powder made for the short magnums when /if it becomes available. The rifle weighs just under 6.0 now and I almost screwed up and sold it awhile back but the new owner didnt want to mess with turning necks so it made it home. Wonderful high country elk/sheep rifle. I stuck with the old 1-10 twist as it has always worked for me.
Aloha,Mark
When fear of death is no longer a big deal~~~ the "Rules of War" change dramatically!
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Joined: Jan 2006
Posts: 5,720
Campfire Tracker
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Campfire Tracker
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6.5 Creedmoor..cool cartridge.gota have one in a walk around!
Come on America,
Athletes and actors are not heroes, only soldiers, airmen,marines and sailors get that respect�and let's add firemen and LEO's
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Joined: Aug 2002
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Campfire Outfitter
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Campfire Outfitter
Joined: Aug 2002
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Mark, I burn a recommended 6.5x284/140 load of 61 grains of RS Magnum in my 6.5 RM for 3,200 mv.
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Joined: Nov 2010
Posts: 37,132 Likes: 1
Campfire 'Bwana
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Campfire 'Bwana
Joined: Nov 2010
Posts: 37,132 Likes: 1 |
Mark, I burn a recommended 6.5x284/140 load of 61 grains of RS Magnum in my 6.5 RM for 3,200 mv.
SU, Ramshot shows a 6.5-284 load, 62 gr. Magnum pushing a 140 gr. Sierra SPBT at 3,070 fps and at 64K psi. IIRC, the 6.5 RM has a bit more powder capacity than the 6.5-284. I would expect lower pressure in the larger case at the cost of some velocity. Unless I'm wrong about the 6.5 RM being a slightly larger case than the 6.5-284. DF
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Joined: May 2007
Posts: 1,666
Campfire Regular
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Campfire Regular
Joined: May 2007
Posts: 1,666 |
Go classic - 6.5x57. (I do like the 256 Newton suggestion though.)
I'm becoming more tolerant of intolerant people.
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Joined: Dec 2002
Posts: 32,201
Campfire 'Bwana
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Campfire 'Bwana
Joined: Dec 2002
Posts: 32,201 |
My 6.5-284 cases, necked down Winchester/Olin 284 brass, hold between 63 and 63.5 grains of H2O. According to my case capacity chart, the 6.5mm Rem Mag has 66 grain of H2O capacity, a difference of 2.5 to 3.0 grains, less than 5%. Assuming a 4.5% increase in case capacity and the 1-4 percentage of velocity to case capacity increase ROT, the difference in velocity is likely to be around 1%.
FWIW, my fastest 6.5-284 has the shortest barrel, 22", but the longest throat, and even with the longer throat it is a pretty good shooter.
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Joined: Nov 2004
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Campfire Outfitter
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OP
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Sell the barrels and buy components. Sounds like you have all your 6.5 needs pretty well covered. If you saw my stash of components you would understand why I need another 6.5. I think the 6.5x47 Lapua is awesome but my last one was hard to sell when I decided to move it. Everyone seemed to want a creedmoor or 260 and local stores wouldn't even consider it in trade. A lightweight 21 or 22" 6.5x47 8 twist faux Ti or similar slinging 140 vlds at 2750 would be cool. The barrels I have right now are just a bit thick to do that right. A 22" creedmoor with a Wyatt's box would work for a walking gun. My heavy creedmoor is chambered with the newer standard .199" freebore which seems like a lot to me but it kisses 140 vlds at about 2.89" and is 1/4 moa accurate at 2810fps. A Wyatt's on a walking rifle would give me enough room to chase even with that deep throat reamer. Of course if I went the Lapua route I wouldn't need a Wyatt's at all. I'm on the list for the long rifles inc group buy on snipers hide for a 264 win and my numbers coming up soon. That #3 rock 8 twist cut to 25" and running 140 vlds at 3200 would be a dragon slayer for sure. I know a 264 will feed and I've got about 600 cases for one on hand but all the 6.5 saum hype going on right now is sucking me in. Bb
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Joined: May 2011
Posts: 2,437
Campfire Regular
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Campfire Regular
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Long action I would go with 6.5-06
Short action 6.5x47
magnum bolt face 6.5 SAUM This... ^^^ But you've got the bases covered already.
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Joined: Jan 2009
Posts: 8,898
Campfire Outfitter
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Campfire Outfitter
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Sell the barrels and buy components. Sounds like you have all your 6.5 needs pretty well covered. If you saw my stash of components you would understand why I need another 6.5. I think the 6.5x47 Lapua is awesome but my last one was hard to sell when I decided to move it. Everyone seemed to want a creedmoor or 260 and local stores wouldn't even consider it in trade. A lightweight 21 or 22" 6.5x47 8 twist faux Ti or similar slinging 140 vlds at 2750 would be cool. The barrels I have right now are just a bit thick to do that right. A 22" creedmoor with a Wyatt's box would work for a walking gun. My heavy creedmoor is chambered with the newer standard .199" freebore which seems like a lot to me but it kisses 140 vlds at about 2.89" and is 1/4 moa accurate at 2810fps. A Wyatt's on a walking rifle would give me enough room to chase even with that deep throat reamer. Of course if I went the Lapua route I wouldn't need a Wyatt's at all. I'm on the list for the long rifles inc group buy on snipers hide for a 264 win and my numbers coming up soon. That #3 rock 8 twist cut to 25" and running 140 vlds at 3200 would be a dragon slayer for sure. I know a 264 will feed and I've got about 600 cases for one on hand but all the 6.5 saum hype going on right now is sucking me in. Bb Sell the barrels and a bunch of components, then go on a hunt? 
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Joined: Aug 2002
Posts: 14,466
Campfire Outfitter
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Campfire Outfitter
Joined: Aug 2002
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Ramshot shows a 6.5-284 load, 62 gr. Magnum pushing a 140 gr. Sierra SPBT at 3,070 fps and at 64K psi.
IIRC, the 6.5 RM has a bit more powder capacity than the 6.5-284. I would expect lower pressure in the larger case at the cost of some velocity.
Unless I'm wrong about the 6.5 RM being a slightly larger case than the 6.5-284. Yes, I know, and I meant 62.0 grains. And yes, the 6.5 RM holds 5 more grains of powder than the 6.5x284. How I am getting 3,200 with that 62.0 grains? I don't know! But, I am! And I'll take it. The only other thing I can think of is summer temps affecting RS Magnum. I'll know this later fall when temps fall and I'll shoot all the powders I've been testing again.
Last edited by SU35; 07/25/13.
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Joined: Jan 2011
Posts: 590
Campfire Regular
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Campfire Regular
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6.5 Creedmoor..cool cartridge.gota have one in a walk around! Me too for some reason. A 260 will do the same thing and is easier and cheaper to find dies, but I want the creed for some reason.
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Joined: Nov 2010
Posts: 37,132 Likes: 1
Campfire 'Bwana
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Campfire 'Bwana
Joined: Nov 2010
Posts: 37,132 Likes: 1 |
Ramshot shows a 6.5-284 load, 62 gr. Magnum pushing a 140 gr. Sierra SPBT at 3,070 fps and at 64K psi.
IIRC, the 6.5 RM has a bit more powder capacity than the 6.5-284. I would expect lower pressure in the larger case at the cost of some velocity.
Unless I'm wrong about the 6.5 RM being a slightly larger case than the 6.5-284. Yes, I know, and I meant 62.0 grains. And yes, the 6.5 RM holds 5 more grains of powder than the 6.5x284. How I am getting 3,200 with that 62.0 grains? I don't know! But, I am! And I'll take it. The only other thing I can think of is summer temps affecting RS Magnum. I'll know this later fall when temps fall and I'll shoot all the powders I've been testing again. That's .264 WM performance in a much more efficient package. What's not to like. Other than specialty rifles, like those made by Quarter Minute Magnum and similar, the .264 WM, in my experience, is harder to find tight shooting loads for than the 6.5-284 and I would think, the 6.5 RM. The typical factory .264, from what I've experienced, is a hit and miss proposition for high end precision. Some may want to challenge that statement. It's just my experience. I wouldn't buy a .264 WM, unless it was a QMM or similar quality. John Burns and company use them in their mega long range shooting. Those aren't factory guns, for sure. His have longer throats than standard. Winchester tried to get all the capacity they could in a std. length action. With longer throads and a full length magazine, the .264 WM can be exploited to its full potential. In the factory version, it's hindered. Seems to me, the 6.5-284, 6.5-06, 6.5 RM and similar are more practical and easier beasts to tame without giving up enough performance to warrent burning all that extra powder. DF
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Joined: Aug 2002
Posts: 14,466
Campfire Outfitter
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Campfire Outfitter
Joined: Aug 2002
Posts: 14,466 |
the .264 WM, in my experience, is harder to find tight shooting loads for than the 6.5-284 and I would think, the 6.5 RM. The typical factory .264, from what I've experienced, is a hit and miss proposition for high end precision. Totally agree, I've had 3 of them. With one 264, I had the the throat lengthened. It still did not bring the results I was hoping for.
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Joined: Nov 2010
Posts: 37,132 Likes: 1
Campfire 'Bwana
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Campfire 'Bwana
Joined: Nov 2010
Posts: 37,132 Likes: 1 |
I think, to get a .264 WM shooting like you and I would like, one would have to go high end custom. The factory guns may or not produce what we're looking for. I wouldn't bet a lot on their performance.
Check out the Quarter Minute Magnum website. Those guys seem to have it figured out. John Burns seems to have a leg up on .264 WM max performance.
I'd say it's not that easy to get a .264 WM shooting that well. And the ammo must be carefully crafted with concentric brass and concentric rounds. The whole set up can have no compromises or holes in the program. It's a total package.
To me, it's much easier to do what you and I have done. We're close to .264 WM performance without the headaches of getting there. My 6.5-284 pushes 140 VLD's at 3K with low S.D.'s and .5 MOA performance. A QMM .264 WM will shoot that good or better and a few fps faster. But, I've got about 1/3 their cost in my rifle, having done a lot of the work myself. Where I hunt, not enough difference to bother with. But, I do like their stuff.
DF
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Campfire Tracker
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BB,
If you're looking for something efficient and a bit unusual, go with a 6.5 Gibbs. Mine is easy to load for, fast and accurate.
Is life so dear, or peace so sweet, as to be purchased at the price of chains and slavery? Forbid it Almighty God! I know not what course others may take, but as for me, give me liberty of give me death! P. Henry
Deus vult!
Rhodesians all now
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Joined: Nov 2010
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Campfire 'Bwana
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Campfire 'Bwana
Joined: Nov 2010
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264,
How about some more info on your Gibbs...
DF
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