6.5 creedmoor to 270 wsm

[Chase723]

That's like saying if you have a 308 you don't need 300 winchester.

Not really. What I am saying is that unless you are going to put a barrel on it with a 1:8 twist to shoot something like the 170gr Berger EOL than you'll neuter the cartridge and won't get the performance you were wanting.

If set up to shoot the 170 EOL the 270 WSM is great, and certainly much better. However most are not. Most run a 1:10 and that definitively limits your ideal bullet selection, and any perceived benefit over the 6.5 Creed by switching will, practically speaking, be very marginal.

Case in point, a 270 wsm shooting the 150gr Berger at 3050fps has 50ft/lbs more energy at 1000 yards then a 6.5 Creed shooting the 143 ELD-X at 2750fps...IMHO that's not worth the cost of the transition.

 

[MOOSE39465]

Moose, when you settle on a barrel and a smith, please let me know. I already have a 270WSM that I want to rebarrel. Good luck sir...

I certainly will. I'm am getting to use a 2b contour. Just got to find a blank in stock.

 

[bigngreen]

A 270 WSM will run a 140 gr bullet 4-500 fps faster than a creedmore, its significant!!

 

[MOOSE39465]

A 270 WSM will run a 140 gr bullet 4-500 fps faster than a creedmore, its significant!!

I was looking on Nosler website. The data on 160 Accubond long range is over. 3000fps. It's comparable to a 7mag

 

[Mram10us]

Not sure if you've decided on your path for your action, but I'd listen to idahoctd on this one. He really knows his stuff. Keep us updated on your build!

 

[bigngreen]

I was looking on Nosler website. The data on 160 Accubond long range is over. 3000fps. It's comparable to a 7mag

Ya, they're basically the same but you don't have to slum it with a 7mm.

 

[Raudy707]

Moose, they don't have a 160 but yes a 150 ABLR with a BC of .591 will be at 3050 fps. And a Creed with a 143 eldx BC .620 out of my son's Ruger American predator with a 22" barrel goes 2660. So lets round up to 2700. At 1000 yds Creed is going 1470 fps 686 ft/lbs energy 29.3 moa drop; 270 wsm 1655 fps 912 ft/lbs energy 22.8 moa drop. So 420 ft/lbs higher at 500 and 220 ft/lbs at 1000. 7.5 moa less drop at 1000. Going to go back and doubke check those stats.

 

[MOOSE39465]

Ya, they're basically the same but you don't have to slum it with a 7mm.

To late I own a 7 mag haha

 

[Gone Ballistic]

My plans are to have the smith open up the bolt face when the action is trued and use a factory ejector. Then bye a new mag box and follower. Have a new barrel installed and use my existing bottom metal, stock and trigger.

It will obviously work well but, I have always felt that it is a little better to build from scratch than rework an action if you can do it for close to the same cost. Excellent way to rework the action, however. What about the extractor? Do you forsee any problems with it or do you feel that the factory one is going to be capable as is without any reworking?

 

[bigngreen]

When you go from standard bolt face to magnum you have to install a M16 or Sako extractor, ejector is fine. It's six one half dozen the other, personally I like to max out a WSM so I go with a med length action like a Tikka which won't need all the work a Rem will and gives you the ability to run a WSM like it should be BUT with bullets like a 140 class a wyatts box in a Rem will give you the room it needs to run real nice.

 

[Chase723]

A 270 WSM will run a 140 gr bullet 4-500 fps faster than a creedmore, its significant!!

Only if you're shooting game within 500 yards, but this is long range hunting and the differences at distance aren't that great unless you're going to use something like the 170gr EOL. Using a 140gr Berger in the 270 wsm going 3150 it has ~250ft/lbs more energy at 500. At 1000 it's only 30ft/Lbs. The 6.5 CM goes transonic at 1075 and the 270 WSM at 1100. Like I said, it's not by much. Doesn't matter that it comes out of the barrel 400-500fps faster. Punch it in your ballistics calculator and see for yourself. If you use the 170gr EOL then there's no comparison whatsoever. It beats the 6.5CM by a HUGE margin. However if you don't, then it just doesn't...and the cost to transition from one to the other for marginal gains in performance doesn't seem worth it. To each his own though.

FWIW, while I own a 6.5CM it's certainly not my favorite cartridge. There's nothing miraculous about it, however pragmatically there's still plenty of things to like about it. Once I burn the barrel out, I'm going to transition it to a 6mm Comp Match.

 

[Mram10us]

That's like comparing a 180hybrid in 7mm to a 180vld in 30cal. No comparison. Not sure why anyone would use a 140 in the 270wsm for long range

 

[bigngreen]

That's like comparing a 180hybrid in 7mm to a 180vld in 30cal. No comparison. Not sure why anyone would use a 140 in the 270wsm for long range

I started into long range with a 270 WSM with a 11 twist barrel and 140 gr bullets, its more formidable than it sounds, a 170 is significant upgrade. 140 Berger at 3300 fps.

 

[bigngreen]

Not really. What I am saying is that unless you are going to put a barrel on it with a 1:8 twist to shoot something like the 170gr Berger EOL than you'll neuter the cartridge and won't get the performance you were wanting.

If set up to shoot the 170 EOL the 270 WSM is great, and certainly much better. However most are not. Most run a 1:10 and that definitively limits your ideal bullet selection, and any perceived benefit over the 6.5 Creed by switching will, practically speaking, be very marginal.

Case in point, a 270 wsm shooting the 150gr Berger at 3050fps has 50ft/lbs more energy at 1000 yards then a 6.5 Creed shooting the 143 ELD-X at 2750fps...IMHO that's not worth the cost of the transition.

Re run your numbers at reality, 270 WSM 140 berger at 3300 fps, 150 at 3250 and 170 at 3000 fps.