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Joined: Jun 2006
Posts: 46,234 Likes: 14
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2006
Posts: 46,234 Likes: 14 |
When I hear of 7mm WSM ammo firing a 160gr non-moly coated bullet at 3250 or 3300 fps, or a .270 Weatherby firing a 150 at 3250, I start to wonder just what kind of peak pressures those loads are hitting... Can't help with the Wby but with some of the Federal Premium 7 WSM 160's, enough to make a nice ejector slot mark on the head and make the bolt stiff.
A wise man is frequently humbled.
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Joined: May 2012
Posts: 1,705
Campfire Regular
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Campfire Regular
Joined: May 2012
Posts: 1,705 |
Perhaps the 270 Win is only barely powerful enough to kill elk. I've never seen an elk let alone shot one with a 270 Win. But I can tell you, loaded with 160g Partitions, they kill the crap outta these little things... ![[Linked Image]](http://bulk-share.slickpic.com/album/share/A3DDuMN5NNNNcN/6096324.1/900/p/IMG-20130929-02642.jpg)
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Joined: Jul 2001
Posts: 60,213 Likes: 26
Campfire Kahuna
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Campfire Kahuna
Joined: Jul 2001
Posts: 60,213 Likes: 26 |
bobnob,
Those are generally considered tougher to kill than elk.
How do they taste?
“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.”
John Steinbeck
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Joined: Jan 2007
Posts: 35,900
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jan 2007
Posts: 35,900 |
When I hear of 7mm WSM ammo firing a 160gr non-moly coated bullet at 3250 or 3300 fps, or a .270 Weatherby firing a 150 at 3250, I start to wonder just what kind of peak pressures those loads are hitting... Can't help with the Wby but with some of the Federal Premium 7 WSM 160's, enough to make a nice ejector slot mark on the head and make the bolt stiff. Yup. bobnob you need to stop showing that sort of thing...the 270 ain't supposed to do that.  It ruins our digestive process and reminds us that we are all entitled to our own opinions, but not to our own facts. 
The 280 Remington is overbore.
The 7 Rem Mag is over bore.
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Joined: May 2012
Posts: 1,705
Campfire Regular
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Campfire Regular
Joined: May 2012
Posts: 1,705 |
Mule Deer, Well in the case of those ones, you'd have to ask the landholder's dogs for whom I cut up the two horses I shot for him that day. Man I can tell you, horses take some cutting up! They were wild buggers that were turned out very young when they couldn't be broken. The male had become very cantankerous and territorial and was even beginning to injure stock. And you couldn't get near them. The one above took the Partition quartering away from me. Tried to find the bullet but I was so worn out cutting the things up eventually I couldn't be bothered. They'll never make a forensic pathologist out of me. The first one went down like a stone. Never seen anything like it. And I was aiming for the hardest part of the shoulder too. The above one was on the trot when I hit it about 150m away and went down after about 30m. Needed a finisher. No exits obviously. ![[Linked Image]](http://bulk-share.slickpic.com/album/share/M53T,NMMhNY3MQ/6096315.1/900/p/IMG-20130929-02640.jpg) The clearest demonstration I've ever seen of the effectiveness of Nosler Partitions on big game. Also showed me how the 270 can punch pretty hard. I can only imagine what those 160 grainers would be like in a full house 270 Wby loading.
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Joined: Feb 2005
Posts: 9,472
Campfire Outfitter
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Campfire Outfitter
Joined: Feb 2005
Posts: 9,472 |
Weatherby factory loads often have ejector marks after firing.
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Joined: Jul 2007
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Campfire Tracker
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Campfire Tracker
Joined: Jul 2007
Posts: 5,173 |
Jordan,
The SAAMI pressure standards are also paired with velocity guidelines, though ammo manufacturers are given a 90 fps, plus or minus, window on velocities. The .257 Weatherby's with 100-grain bullets is 3580 fps, and the .270 Weatherby's with 150's is 3230. And, Weatherby has been delivering those velocities for a very long time. I believe the .270 and .257 Wby cartridges are among the oldest in that line. Some Wby rifles have been in use for 50+ years, without a problem, using cartridges loaded to factory levels. Guy
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Joined: Mar 2006
Posts: 14,556 Likes: 7
Campfire Outfitter
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Campfire Outfitter
Joined: Mar 2006
Posts: 14,556 Likes: 7 |
Guys have also been loading the 7RM with 160's to 3150 fps for a long time, but that doesn't mean it's necessarily a good idea to constantly be pushing it that hard 
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Joined: Jun 2006
Posts: 46,234 Likes: 14
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2006
Posts: 46,234 Likes: 14 |
I've had those unused boxes of factory 7 WSM sitting on the shelf for a long time too. Long being a relative term.
I'll sell 'em to ya?
A wise man is frequently humbled.
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Joined: Nov 2002
Posts: 33,792 Likes: 13
Campfire 'Bwana
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Campfire 'Bwana
Joined: Nov 2002
Posts: 33,792 Likes: 13 |
It is something to see that this rather simple thread continues. A gun writer's creation? Really.
Conduct is the best proof of character.
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Joined: Jun 2006
Posts: 46,234 Likes: 14
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2006
Posts: 46,234 Likes: 14 |
Where else can you go to see someone beating a dead horse, literally?
A wise man is frequently humbled.
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Joined: Nov 2000
Posts: 2,509
Campfire Regular
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Campfire Regular
Joined: Nov 2000
Posts: 2,509 |
Fer crapping yer pants out loud, this stuff ain't freeking rocket science. For whatever diameter of bullet you decide to shoot, you pick the case capacity that will give the desired velocity, taking felt recoil, availability and a few other things into consideration. The name given to that little brass pail that holds the powder has a headstamp given to it for marketing purposes, and imparts absolutely no panache, killing power, dignity, or anything else to the bullets performance. For whatever little brass pail that one chooses to hold the powder behind his choosen bullet, there are several other little brass pails that approximate the capacity, and they approximate field performance four times better than they approximate case capacity.
No one has a little brass pail behind their bullets that is far superior to any other little brass pail of approximate capacity.
And, magnum is about the most vague term that can be applied to a cartridge. It doesn't even mean the owner has a bigger schlong than non magnum shooters. This is the most straight forward sensible post regarding "cartridge" performance that I have ever read and it agrees with my own way of thinking. The "brass pail" does little in regard to "performance" of a bullet...afterall, the "pail" never leaves the rifle, the bullet does. Most guys approach this from the wrong end......look at bullet placement,construction and impact velocity and work backwards. When you get to the little brass pail you'll see how little it means, and whatever combination of letters and numbers stamped on it mean even less.
"after the bullet leaves the barrel it doesn't care what headstamp was on the case"
"The 221 Fireball is what the Hornet could have been had it stayed in school"
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Joined: Feb 2010
Posts: 17,927
Campfire Ranger
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Campfire Ranger
Joined: Feb 2010
Posts: 17,927 |
Intended target, expected distance (or shooters capability) then all that other jazz. But I'd guess it seldom happens that way. Guys like pretty rifles, find good deals, hand-me-downs, so on and so forth.
Apples to apples though, I still say a 140 NAB in a 270 is as close as you're going to get to 160 NAB in a 7RM. I gave up on my 7RM project and will have to suck a little hind tit. Hind tit is better than no tit. And for now a SG pack has more appeal than another rig.
Fun thread though. Pretzel likes to twist chit and got his money's worth. Pun intended.....
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Joined: Feb 2010
Posts: 17,927
Campfire Ranger
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Campfire Ranger
Joined: Feb 2010
Posts: 17,927 |
I've had those unused boxes of factory 7 WSM sitting on the shelf for a long time too. Long being a relative term.
I'll sell 'em to ya? Let me guess, you were holding out for a 7mm Wiztucky? BTDT
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Joined: Jun 2006
Posts: 46,234 Likes: 14
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2006
Posts: 46,234 Likes: 14 |
Let me guess, you were holding out for a 7mm Wiztucky?
BTDT Nope, had one in 7 WSM, it's now a 6.5 WSM. Those are sitting on the shelf because they clocked 3200+ fps. with 160 Partitions, left really obvious ejector slot marks on the head, and almost required a breaker bar to lift the bolt.........
A wise man is frequently humbled.
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Joined: Feb 2010
Posts: 17,927
Campfire Ranger
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Campfire Ranger
Joined: Feb 2010
Posts: 17,927 |
Ouch.....
Bet the 6.5 is a lazer and then some.
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Joined: Sep 2010
Posts: 19,179
Campfire Ranger
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Campfire Ranger
Joined: Sep 2010
Posts: 19,179 |
Ouch.....
Bet the 6.5 is a lazer and then some. Oh yeah, the 6.5 is mo betta!!    S H E E S H !
jwall- *** 3100 guy***
A Flat Trajectory is Never a Handicap
Speed is Trajectory's Friend !!
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Joined: Feb 2010
Posts: 17,927
Campfire Ranger
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Campfire Ranger
Joined: Feb 2010
Posts: 17,927 |
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Joined: Jun 2006
Posts: 46,234 Likes: 14
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2006
Posts: 46,234 Likes: 14 |
Ouch.....
Bet the 6.5 is a lazer and then some. Oh yeah, the 6.5 is mo betta!! Only if Petzal has a beef with it.
A wise man is frequently humbled.
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Joined: Apr 2001
Posts: 626
Campfire Regular
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Campfire Regular
Joined: Apr 2001
Posts: 626 |
Wow,
58 pages on this thread. Petzal sure got you guys going!
Not bad for an old man who does not know what to write about as one poster wrote.
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