7 mm SHERMAN SHORTMAG vs 7 SAUM

[elkaholic]

I have a 7ss with a 26" bart. I'm getting 2930 fps with the 180 eld'm. Haven't shot it a lot so maybe it will speed up in another 50-70 rounds. Was hoping for 3000 just cause it's a nice round number but if I don't get there I
don't get there.

Regards

What powder and charge? It should be capable of a lot more with the right combo.

 

[5RWill]

Rich what was your charge for when you tested with the 195gr EOL? I've been digging through the thread but couldn't find it.

 

[cjl2010]

Rich what was your coal with the 195s as well? Thanks

 

[elkaholic]

I think it was 59 RL26 and coal around 2.920"

 

[cjl2010]

I think it was 59 RL26 and coal around 2.920"

How fast were you pushing them?

 

[elkaholic]

How fast were you pushing them?

About 2900 with 59 grs. I fired up to 61 at 2985 which was max in my rifle. Started to get heavy bolt lift.

 

[cjl2010]

Would you expect around 25fps loss per inch of barrel with the 7ss?

 

[elkaholic]

Would you expect around 25fps loss per inch of barrel with the 7ss?

No more than that. Probably 20-25.
The ss case is so much more efficient that it doesn't act like a belted mag!

 

[Farmerbrown32]

Now shooting the 180 berger over 3000 fps with h4831sc well below half moa. What an awesome little cartridge. Can wait to slay a yote with it.

 

[cjl2010]

Now shooting the 180 berger over 3000 fps with h4831sc well below half moa. What an awesome little cartridge. Can wait to slay a yote with it.

Excellent speed. Should be similar burn rate to rl23 correct?

 

[elkaholic]

Excellent speed. Should be similar burn rate to rl23 correct?

I think 23 is a little slower. Should work even better.

 

[5RWill]

Now shooting the 180 berger over 3000 fps with h4831sc well below half moa. What an awesome little cartridge. Can wait to slay a yote with it.

What barrel length?

 

[elkaholic]

What barrel length?

He only has a 23".

 

[Farmerbrown32]

Yes a 23" bartlein 2b 1-9 twist