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270 WSM for Long Range Hunting?

 
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Old 02-15-2010, 12:34 PM
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270 WSM for Long Range Hunting?

Any thoughts? Long range for me would be 6-700 yards, deer size game, maybe up to elk size on occasion. The 7mm's, 6.5's are gettin all the love. Anyone using the 270 WSM?

I have a HS Precision barreled action, thinking about adding a tactical stock and scope with range compensating turret. Looks like the best bullet, as far as B.C., is the 150 Berger VLD with a B.C. of .531. I don't know what kind of velocity this combo would provide. Anyone?
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Old 02-15-2010, 12:39 PM
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Re: 270 WSM for Long Range Hunting?

If the 7mm's and 264's are getting all the love there is a reason. High BC and better bullet choices. I would do the 7mm or 264 off that case. My 264-300 wsm shot very well with a 130 grain swift bullet that had a higher bc than the bullet you quoted and is a quality big game bullet. The 7mm wsm is a great rifle at the range you mentioned with the high bc 7mm bullets available. They just beat the 270 bottom line.
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Old 02-15-2010, 12:59 PM
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Re: 270 WSM for Long Range Hunting?

I know it's the B.C. numbers that raise the bar on the 7's and 6.5's for comparison purposes, so I guess the question is, is it a big difference? The 270 WSM and Weatherby both have really good numbers on paper, but since the .270 bullets are not as high in the BC category, in comparison to the others mentioned, does that make it a "poor" long range performer or non-viable. A .270 bullet, with a .531 BC, at 3,000 FPS sounds pretty salty?
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Old 02-15-2010, 01:00 PM
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Re: 270 WSM for Long Range Hunting?

You can add the Hornady sst 150 at .525. The Nosler BT is a conservative .496 I can get 3100fps out of 270 win using the Nosler. This is 58gns of A3100 over a 215. It's well above what they publish now, but it was without a coated bullet. Molly or other coating should make for alittle less pressure. I don't see pressure signs in a Vangard. Run the numbers through a program and you have plenty of smack at those ranges. Best thing is with a 10 twist spin drift is better than an 8 twist. Also it will work with the 150's well. Getting 3200fps with the wsm should be fairly easy having the room to seat the bullet out where it needs to be is another story.
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Old 02-15-2010, 01:45 PM
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Re: 270 WSM for Long Range Hunting?

The 270 wby is a good cartridge for longer shots. I have been working with the 150 SST's out of one of mine at 3300 fps. A .525 at 3300 fps is a very good long range round. My 7mm wby though has better numbers and so does my 264 STW. Not saying the 270 is not good because it is. Just the higher BC 7mms give that caliber better numbers at long range. I have made some amazing shots with my 270 wby and love to shoot it. My longest kill with it was an elk in Colorado during the 1970's at about 1100 yards.
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Last edited by Long Time Long Ranger; 02-15-2010 at 05:11 PM.
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Old 02-15-2010, 02:09 PM
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Re: 270 WSM for Long Range Hunting?

Quote:
Originally Posted by Long Time Long Ranger View Post
The 270 wby is a good cartridge for longer shots. I have been working with the 250 SST's out of one of mine at 3300 fps. A .525 at 3300 fps is a very good long range round. My 7mm wby though has better numbers and so does my 264 STW. Not saying the 270 is not good because it is. Just the higher BC 7mms give that caliber better numbers at long range. I have made some amazing shots with my 270 wby and love to shoot it. My longest kill with it was an elk in Colorado during the 1970's at about 1100 yards.

There's the proof in capable hands. Here are some things to ponder also.

There are two things to consider when picking a bullet... BC and velocity. If you are shooting a high BC bullet for caliber, you want that to help negate the effects of the loss of velocity. The high BC then comes into play in maintaining energy.

Now to stir some feathers. The optimum velocity for most bullets is right around 1800fps. This is optimal for the bullet to open up correctly and do what it is designed to do. So with that said, if we look at say a .224 caliber bullet, 1800fps is way out there, but energy is low. This in theory means that the bullet should open up and act as it should, but does not have the down range energy, but you have a functional bullet due to velocity working as the catalyst. Soooo... the 270WSM has been disproving the theory of BC is superior.

BC is definitely a factor in producing proof positive results of creating good wound channels and maintaining its ballistic superiority down range in the wind. But we have calibers like the 25-06 and 270WSM that can smoke low BC bullets down range that perform as they are expected because of velocity. 600 to 700yrds is not difficult for a 270WSM to smoke deer size game at that distance. Good shot placement on an elk I would imagine do what it is suppose too.

If you were to use the 150 SST at a velocity of 3200+ you have enough energy to knock down an elk to 610yrds (2123fps, 1501 energy) and deer/antelope to 880yrds (1745fps, 1014 energy). If we stay with the theory of 1800fps, theoretically we should be able to harvest an elk due to proper bullet function at 840 yards. You just would not have the energy to punch a bullet through the animal (in theory).

Condition for calculations:
950ft, 30 deg., 29.69 Baro, 46%Humidity (Today in PA)

So if you were hunting in elevations of approximately 3000 to 5000 feet you would have enough energy to take an elk at 700+yards with a 150grn Hornady SST or any bullet with the same design and comparable BC.

Tank
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Old 02-15-2010, 02:52 PM
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Re: 270 WSM for Long Range Hunting?

You guys all rock, great, great info, thanks!
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