.270 Win, .280 Rem or 7mm JRS

[robozebra]

I'm looking to have a hunting rifle built on a long action that I acquired. I'm thinking something in the 7mm range. I was trying to decide between the .270 and .280 when I came across the 7mm JRS. Anyone know much on this round? Looks promising ballistically. Is it tough to make the brass? I saw something saying you shouldn't fire-form the brass from .280. Anyone know of a source for the brass? Am I missing something in this range that I need to consider? (Action has a .473 boltface, so I've eliminated 7mm RM.)

Thanks...CWJ

 

[Jerry m]

Re: .270 Win, .280 Rem or 7mm JRS

Long action in 7mm: I would look closely at the .280 Ackley. Nosler standardized it with ammunition, brass, and loading data.

.284 has a strong following also.

Good luck

Jerry

 

[tylerw02]

Re: .270 Win, .280 Rem or 7mm JRS

.280 AI

 

[BobinNC]

Re: .270 Win, .280 Rem or 7mm JRS

Look at available case capacities:

.284 Win 66 grains
.280 Rem 68 grains
.280 AI 73 grains
7mm JRS 75.5 grains

 

[southpaw68]

Re: .270 Win, .280 Rem or 7mm JRS

Yup...280 AI is definitely one you should consider in this debate...I started with a .280 and love the cartridge but wanted something that shoots a little flatter a few hundred yards out without the recoil of a .300 Win. Mag. so I ordered and an E.R. Shaw in .280 AI. I can't wait to get that thing to the range!!!
To bad the wait list is so long.

 

[robozebra]

Re: .270 Win, .280 Rem or 7mm JRS

Thanks for the comments. I thought about the 280AI. I jumped over it to the JRS if I'm going to need to fire-form anyway, I might as well go to more case capacity. Of course, I've never fire-formed brass, so I might be getting into something I don't want to do. Have available brass moves the 280AI back into contention....

CWJ

 

[southpaw68]

Re: .270 Win, .280 Rem or 7mm JRS

I do not have personal experience with fire forming brass, but I have done quite a bit of research on the subject with regard to .280/.280 AI. What I learned is that you can take .280 rounds and fire them in a .280 AI chamber with little to no change in performance and voila...you have 280 AI brass. So in a pinch you could easily hunt/shoot with standard .280 rounds. Now obviously you can't reload and put that brass back into a .280. I don't intend to own both at the same time so I shouldn't run into any trouble, but will still mark my brass that has been fire formed from .280 to .280AI so as to reduce the chance of mixing the brass up. I have an abundance of .280 brass so I won't be looking at new .280AI brass any time soon. I haven't looked into the 7mm JRS but if you are talking fire forming, it must have a parent cartridge that is used and probably uses a similar process to attain the brass dimentions you would desire for this round.

As always...YMMV.

Good luck with your choice.

 

[threetrees]

Re: .270 Win, .280 Rem or 7mm JRS

270 - you get it everywhere. so many make them that it should be easy to find one that really suits your rifle (assuming you don't want to reload).

if you want to go for flatter trajectory - there are the 270 wsm ... with my heavier rifle, i think that my wsm kicks notably less than the 270 hunting rifle of my old man

 

[BobinNC]

Re: .270 Win, .280 Rem or 7mm JRS

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: southpaw68</div><div class="ubbcode-body">I do not have personal experience with fire forming brass, but I have done quite a bit of research on the subject with regard to .280/.280 AI. What I learned is that you can take .280 rounds and fire them in a .280 AI chamber with little to no change in performance and voila...you have 280 AI brass. So in a pinch you could easily hunt/shoot with standard .280 rounds. Now obviously you can't reload and put that brass back into a .280. I don't intend to own both at the same time so I shouldn't run into any trouble, but will still mark my brass that has been fire formed from .280 to .280AI so as to reduce the chance of mixing the brass up. I have an abundance of .280 brass so I won't be looking at new .280AI brass any time soon. I haven't looked into the 7mm JRS but if you are talking fire forming, it must have a parent cartridge that is used and probably uses a similar process to attain the brass dimentions you would desire for this round.

As always...YMMV.

Good luck with your choice. </div></div>

Just a technical note: The 7mm JRS cannot be just fireformed using any available case. Attempting to do so is dangerous because the 7mm JRS pushes a 35-degree shoulder more than 0.050-inch forward of where it would be on the 280/280 Improved.

A case forming die must first be used, then the case is fireformed. One is available from Wise Custom Guns based on dimensions provided to RCBS.

 

[robozebra]

Re: .270 Win, .280 Rem or 7mm JRS

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: BobinNC</div><div class="ubbcode-body">
Just a technical note: The 7mm JRS cannot be just fireformed using any available case. Attempting to do so is dangerous because the 7mm JRS pushes a 35-degree shoulder more than 0.050-inch forward of where it would be on the 280/280 Improved.

A case forming die must first be used, then the case is fireformed. One is available from Wise Custom Guns based on dimensions provided to RCBS. </div></div>

Ok. So I can run 280 brass through the case forming die and then load it and shoot it? Will shooting it complete the "forming" process?? Sorry this is a noob question...

I appreciate the help... CWJ

 

[southpaw68]

Re: .270 Win, .280 Rem or 7mm JRS

.280 brass does not need to be run through a die first. If you have factory loads you simply load it in a .280 AI and shoot away. This forms the .280 brass to the .280AI chamber dimensions without causing any problems with excessive case stretch. As a precaution I would measure the fireformed brass to make certain of concentricity of the case mouth, and check for cracks which should not be a problem, but beyond that you should be good to go. I have some variations of this from other people, but that is the gyst and is completely safe.

Edit: AS ALWAYS...ymmv...this the internet after all.

 

[BobinNC]

Re: .270 Win, .280 Rem or 7mm JRS

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Robozebra</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: BobinNC</div><div class="ubbcode-body">
Just a technical note: The 7mm JRS cannot be just fireformed using any available case. Attempting to do so is dangerous because the 7mm JRS pushes a 35-degree shoulder more than 0.050-inch forward of where it would be on the 280/280 Improved.

A case forming die must first be used, then the case is fireformed. One is available from Wise Custom Guns based on dimensions provided to RCBS. </div></div>

Ok. So I can run 280 brass through the case forming die and then load it and shoot it? Will shooting it complete the "forming" process?? Sorry this is a noob question...

I appreciate the help... CWJ
</div></div>
If your talking about the 7mm JRS, Yes. The 280 AI can be fireformed in the chamber, no special forming die needed.

Also Factory 280 AI brass is available from Nosler. The 7mm JRS is a bunch of work for a 2.5 grain increase in capacity.

 

[Silver_Bullet_00]

Re: .270 Win, .280 Rem or 7mm JRS

If its strictly for hunting whitetail and an occasional elk, I would go with the .270, just because of ammo availability at every outdoor store in North America. It was Jack O'Connor who made the round famous for hunting. His favorite round. He took every North American game with it. They used to load them hotter back in the day before they started marketing all these magnums. If you hand load, you can load them up to magnum capabilities. I like the Hornaday for off the shelf .270 ammo.

 

[robozebra]

Re: .270 Win, .280 Rem or 7mm JRS

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: BobinNC</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Robozebra</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: BobinNC</div><div class="ubbcode-body">
Just a technical note: The 7mm JRS cannot be just fireformed using any available case. Attempting to do so is dangerous because the 7mm JRS pushes a 35-degree shoulder more than 0.050-inch forward of where it would be on the 280/280 Improved.

A case forming die must first be used, then the case is fireformed. One is available from Wise Custom Guns based on dimensions provided to RCBS. </div></div>

Ok. So I can run 280 brass through the case forming die and then load it and shoot it? Will shooting it complete the "forming" process?? Sorry this is a noob question...

I appreciate the help... CWJ
</div></div>
If your talking about the 7mm JRS, Yes. The 280 AI can be fireformed in the chamber, no special forming die needed.

Also Factory 280 AI brass is available from Nosler. The 7mm JRS is a bunch of work for a 2.5 grain increase in capacity.

</div></div>

Yes, I was referring to 7mm JRS. Thank you and sorry for the confusion.

I'm trying to stay away from Magnum bolt face rounds. The action belonged to my uncle and I don't want to change too much on it.

As for the rifle's purpose, I have a 338LM, 300WSM, 308, 6.5CM and 6XC. I'm just looking to fill the GAP from 308 to 300 WSM. Ideally, it'll end up making a nice hunting rifle too.

I'm not finding an abundance of barrels for the .270. Whereas, you can't swing a dead cat without hitting a 7 mm barrel. Of course looks like I'm going to be waiting 4 months for a stock, so might as well wait for a barrel...

Thank you to everybody for your comments.

CWJ

 

[robozebra]

Re: .270 Win, .280 Rem or 7mm JRS

How about a 284 Winchester? Looks fairly appealing...

CWJ

 

[country888]

Re: .270 Win, .280 Rem or 7mm JRS

I have a remington 700 in 280. I cant ask for a better deer rifle! I have shot many at 300 yards or better, that never even kicked. The 280 is a great round for anything in North Amaerica. I shoot 140gr nosler BT with 3/4in groups or better out of a mountain rifle.

Im not nocking the 270 or the 280AI, both are great rounds. I do like the 7mm bullet, you have alittle more bullet selection over the 270. Just my 2cents.

Good luck with your build and enjoy!