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Joined: Jan 2007
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Campfire 'Bwana
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Campfire 'Bwana
Joined: Jan 2007
Posts: 35,900 |
The 280 Remington is overbore.
The 7 Rem Mag is over bore.
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Joined: Mar 2006
Posts: 14,488
Campfire Outfitter
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Campfire Outfitter
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.284 Win with 0.010" less body taper, and about 3.5gr more powder capacity.
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Joined: Jan 2007
Posts: 35,900
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jan 2007
Posts: 35,900 |
Oh... Thanks Jordan! 
The 280 Remington is overbore.
The 7 Rem Mag is over bore.
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Joined: Mar 2006
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Campfire Outfitter
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Campfire Outfitter
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It is my aim to please
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Joined: May 2011
Posts: 2,437
Campfire Regular
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Campfire Regular
Joined: May 2011
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Done right a .284 win ( or Shehane ) is pretty groovy...
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Joined: Mar 2012
Posts: 683
Campfire Regular
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Campfire Regular
Joined: Mar 2012
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Jordan, which powder(s) are you or others using to get those speeds with the WSM?
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Joined: Apr 2001
Posts: 28,277
Campfire Ranger
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Campfire Ranger
Joined: Apr 2001
Posts: 28,277 |
I could be wrong seven_miller but I believe they're using a new prototype powder called H75KPSI that just came out this year......  Dober
"True respect starts with the way you treat others, and it is earned over a lifetime of demonstrating kindness, honor and dignity"....Tony Dungy
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Joined: Feb 2011
Posts: 11,273
Campfire Outfitter
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Campfire Outfitter
Joined: Feb 2011
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Thinking lots of those guys use H4831sc and various Vihtavouri powders, and probably some Norma stuff too. Or what my man Dober said... 
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Joined: Mar 2006
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Campfire Outfitter
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Campfire Outfitter
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IMR7828ssc, Norma MRP, R25, N570 Scroll down: http://www.6mmbr.com/7mm284.html
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Joined: Mar 2012
Posts: 683
Campfire Regular
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Campfire Regular
Joined: Mar 2012
Posts: 683 |
I could be wrong seven_miller but I believe they're using a new prototype powder called H75KPSI that just came out this year...... Dober Haha! Wouldn't it be interesting if we all had our loads pressure tested... And thanks guys, I was just curious.
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Joined: Jan 2004
Posts: 623
Campfire Regular
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Campfire Regular
Joined: Jan 2004
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C'Mon Man! H75KPSI isn't a new powder, it's the same ol' powder the 7mm "Mashed-Taters" crowd has been using for decades. We all know that H75KPSI goes best with only certain favored 7mm cartridges and purple kool-aid..... gosh, the rest of us would be a fool to use it in anything else...
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Joined: Oct 2001
Posts: 6,028
Campfire Tracker
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Campfire Tracker
Joined: Oct 2001
Posts: 6,028 |
When its time to fight, you fight like you are the third monkey on the ramp to get on Noah's Arc... and brother, it is starting to rain!
The chair is against the wall.
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Joined: Mar 2002
Posts: 9,130
Campfire Outfitter
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Campfire Outfitter
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I could be wrong seven_miller but I believe they're using a new prototype powder called H75KPSI that just came out this year...... Dober More like +85KPSI, most guys were running them pretty hard to get 2950 with the 180's in the 7WSM, a 195 is alot of bullet in that short fat case and I think a better bullet for the longer cases, but what a LR missle it would be!
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Joined: Mar 2006
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Campfire Outfitter
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Campfire Outfitter
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I'd love to see some calculations from QL, if anybody is willing...
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Posts: 8,294
Campfire Outfitter
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Campfire Outfitter
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Any news on the 7/375 Ruger? Seems a good fit here also...
W
"I would build one again, if it were not for my 350RM (grin)."
MtnHtr
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Joined: Nov 2006
Posts: 286
Campfire Member
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Campfire Member
Joined: Nov 2006
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QL shows the following with a 180 Berger and 26" barrels to make 2950
58593psi for the 7 Rem Mag
70697psi for the 7 WSM
The 195 is going to take a large case for sure to make it work well.
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Joined: Mar 2006
Posts: 14,488
Campfire Outfitter
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Campfire Outfitter
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Posts: 14,488 |
Just curious- what were the input details on the two loads? The 7WSM is within 0.5gr in case capacity of the 7RM, so assuming equal input variables, pressures should be a lot closer than that, I would think.
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Joined: Aug 2002
Posts: 14,463
Campfire Outfitter
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Campfire Outfitter
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want to take it to 1300yds. Since you're hunting, I'm sure you expect an impact velocity to open up the bullet. Don't you? I don't think the 284 S or 280 Ackley will do that at 1,300 yds.
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Joined: Jan 2007
Posts: 35,900
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jan 2007
Posts: 35,900 |
I could be wrong seven_miller but I believe they're using a new prototype powder called H75KPSI that just came out this year...... Dober More like +85KPSI, most guys were running them pretty hard to get 2950 with the 180's in the 7WSM, a 195 is alot of bullet in that short fat case and I think a better bullet for the longer cases, but what a LR missle it would be! Well, you have to figure even if just intuitively, that 2950 is about what you get with a 180 gr 30 caliber bullet in the 300 WSM;a 7mm bullet weighing 15 gr more with less base for the gas to push on,(and likely more bearing surface because it's longer)is going to be harder to get to the same velocity in a case of the same capacity...and only one thing will do it....more pressure. I could be all wet here, but in a case with the capacity of the 7 Rem mag and 7mm WSM, I'd be happier with something like a 162 Amax myself.You'll start it faster for sure, and the 195 might catch up, but at what distance I don't know..  Numbers anyone?.......anyone? 
The 280 Remington is overbore.
The 7 Rem Mag is over bore.
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Joined: Mar 2006
Posts: 14,488
Campfire Outfitter
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Campfire Outfitter
Joined: Mar 2006
Posts: 14,488 |
Just for you, Bob ![[Linked Image]](http://a4.ec-images.myspacecdn.com/images02/153/da09f06d92eb42ea953aedf406419ff1/l.png)
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