300 PRC SHERMAN IMPROVED

[elkaholic]

Looks good!

Do you have have a smith who's going to get a reamer and doing any chambering? I got to thinking that it'd probably easier for me just send a barrel and action to a guy who already has a reamer instead of renting a reamer from you and having it sent to a smith.

Pretty sure I will. They would be crazy not to because there will be a fair amount spun up I'm guessing.
I know Axial Precision will have one for their own rifles.

 

[yorke-1]

Pretty sure I will. They would be crazy not to because there will be a fair amount spun up I'm guessing.
I know Axial Precision will have one for their own rifles.

Perfect. I just got a set of dies pre-ordered so now I'll just have to figure out which action to use once everything gets in.

 

[elkaholic]

Perfect. I just got a set of dies pre-ordered so now I'll just have to figure out which action to use once everything gets in.

Contact the guys at Axial Precision. They will have a reamer for sure and they produce some top notch rifles.

 

[bsaoneshot]

What was the volume of the actual 300 PRC brass after firing?
Thanks

 

[elkaholic]

What was the volume of the actual 300 PRC brass after firing?
Thanks

About 98 grains
I measured the prc case at about 96.5
The biggest gains are it the case design more than the little extra volume.

 

[ruby76]

Will the 225 be seated out further to allow some extra capacity?

 

[elkaholic]

Will the 225 be seated out further to allow some extra capacity?

Yep!

 

[elkaholic]

There will plenty of room for any bullet!

 

[Weatherby Fan]

What's the coal with the S.I. case and the 225 ?

What's the shoulder angle on the SI case ?

 

[elkaholic]

What's the coal with the S.I. case and the 225 ?

What's the shoulder angle on the SI case ?

I haven't calculated exactly what the coal to the lands is yet, but it will be pretty much the same as the PRC. In the 3.750 area.
40 degree shoulder

 

[Weatherby Fan]

I haven't calculated exactly what the coal to the lands is yet, but it will be pretty much the same as the PRC. In the 3.750 area.
40 degree shoulder

Thanks Rich

I spoke to Hornady and the 300 PRC 225gr ELD-M will be 3.685"
212gr ELD-X will be 3.650"

 

[elkaholic]

Thanks Rich

I spoke to Hornady and the 300 PRC 225gr ELD-M will be 3.685"
212gr ELD-X will be 3.650"

Ok, the S.I. will be within a couple thou of that.
Was that their coal estimate to the lands or where they load it?

 

[Weatherby Fan]

Ok, the S.I. will be within a couple thou of that.
Was that their coal estimate to the lands or where they load it?

That's the actual OAL of the loaded ammo

 

[elkaholic]

That's the actual OAL of the loaded ammo

Ok, that makes more sense. With their chamber spec, it will be taking a B I G JUMP!
Their chamber, and mine, will require more like 3.780" to the lands it looks like.