Is the M7 action long enough for the Roberts?

Will any work need to be done for proper feeding?


Thanks, Rob

Many people think that a 700 SA is too short for a 257R. I believe the .500" shorter M7 would be more of a handicap. You might consider the 250-3000 AI as an alternative.

The .257 Roberts is a fine cartridge and I am a huge fan of it and own a couple, but I don't see why you would want to take another great cartridge like the .250 Savage and mess with it to get a few more fps and make it a .257 Roberts?
The gain would be hardly worth the expense in my humble opinion. The 250 and 257 are both fine Deer rounds and I would be very proud to own a 250 Savage.
I too agree with Eddie that you may have trouble with the M7 short action on your Rem.
Good Luck.

Your model 7 in .257 savage is interesting !
Can I asume it is a rebarrel ? I never herd of remington producing one.
A limited adition ?
I think its too short for a roberts...tj3006

Thanks, just an idea I was tinkering with, turns out a bad one.

The barrel is from a 700 Classic that I put on an M7 action and in a McMillan stock. I built it for javelina and leave it in AZ with a friend. I'll be out there on Friday using it and the idea had popped into my head.

Moment of maddness has passed.

Thanks again,

Rob

quote:

Originally posted by Recoil Rob:
Is the M7 action long enough for the Roberts?

Will any work need to be done for proper feeding?

Hey Rob, I have a good number of M7s and the "normal" limiting factor is 2.800" OCL.

I was ready to agree with Eddie, because a buddy of mine has a M700 Short Action chambered in the 257Roberts from the factory. Eddie is correct that the M700 Short Action is a bit longer than the M7.

And I know my buddy has mentioned that some of his Bullets look very short when Seated to fit the magazine in it. It is due to his trying to use the "Sleekest" Bullets on the market when any good Round Nose or Standard Grade Spire Point would do.

So, I'd recommend you go find a couple of 257Roberts Cases, Seat the Bullets you want to try(without a new Primer) at or below 2.800" and take a look at them. If you have a M7(260Rem, 7mm-08, 308Win), see how they feed.

And for sure look at the OCL listed in your newest Speer Manual. I have #12 right here beside me(#13 is down in the Reloading Room) and the longest they Seated ANY of the Bullets in the 257Roberts was 2.780" OCL - which REALLY surprised me.

Best of luck to you.

The 257 classic was built on a long action, I had a mountain rifle built on a short action, the barrel's throat was .2" longer than the magazine with a normal 117 bullet. I'd shoot it & see what happens but if it is like my now sold mountain rifle it will be a 1-1.75" rifle. You should try Hornady 117 round nose bullets. If you want to spend $500 for a rebarrel the throat could be made to match the magazine.

Ya know a .250 savage improved is mighty clost to a .257 roberts ! Might be a better choice if ya want to speed things up a little !
...tj3006

wil it work at factory length?
sure, the m7 works for 2.8" rounds

will you see an improve in velocity?
Sure

can it be as a rechamber? I BELIEVE (but not looking at reamer prints) it is a rechamber away.. if not, it is a setback and rechamber

does the 'bob work better at longer lengths?
yeah, it certainly does

HOWEVER
the winchester +p loading at 2.8 with 117 bullets is preppy peppy for the 257 ..



both the 250 sav and 257 bob at great rounds, do you have a specific complaint on the m7 or just want a larger case?

Just a heads up for every one. The mag box on a m7 and a m700 s/a are the same length. For that matter the loading port is longer on a m7. At least on the ones I have owned. So any thing that will feed in a m700 s/a will feed just as well in a m7. The difference in length between the two is from the front of the rear bridge to the tang. The rear bridge is shorter if you will.



m7 on top and m7 mag box below m700

Shawn

the idea that a longer action will get you increased performance from the .257, while technically true, is in practice not seen. THe velocity difference between a regular .257 and one loaded to a slightly longer length is a very few feet per second muzzle velocity increase.

Of course you can jack the pressure up on the longer loaded round and see a larger increase, but when loaded to the same pressures, the shorter is equal to the longer in practical terms.

Will Talleys work on a Model 7? I've not seen the rear bridge and wondered what sort of base is used.

A model 7 in 250savage would be a hell of a rifle for a sound moderator. Short, well balanced, efficient in short barrels etc etc.

Hey Bluetick thanks for posting that picture, visually that clears things up for me, I always thought a model 7 action was shorter but your picture shows the truth!

If you need 25 caliber... a 25/08 should be equal to case capacity of a Roberts.. if not, a 25/08 AI would certainly be...

But a 257 Roberts with a 100 grain bullet will fit into a short action.. however my personal preference would be on a long action...

A .250 M7 seems like a neat idea. Buy an additional rifle if you want a .257.