30 sherman magnum

[elkaholic]

So I would basically need a 300 Rum to start then the right mags. I can get action or gun right now. There in stock

any std bolt face magnum that will give you 3.75" coal will work
You can open the bolt from an '06 to a mag and put in an M16 extractor but it would likely be cheaper to just get the magnum action

 

[PowerstrokeOBX]

Any 7 rem mag, 300 wm, or 300 rum actionwould work. There's some more more but those are just the most common.

Stay away from short mag actions.

 

[Mudder500]

Any 7 rem mag, 300 wm, or 300 rum actionwould work. There's some more more but those are just the most common.

Stay away from short mag actions.

I emailed Sherman and was told to run a magnum for the 300 due to cost of modifying a standard long action

 

[elkaholic]

I emailed Sherman and was told to run a magnum for the 300 due to cost of modifying a standard long action

But if its i magnum long action, no mod is needed.

 

[Mudder500]

But if its i magnum long action, no mod is needed.

You are correct sir. Now to start finding parts cheap or on sale

 

[Coop690]

Currently having a 30SM built but trying to decide between 26" or 28" barrel. Does anyone have data on 215gr and 230gr out of a 26"?

 

[Mudder500]

Has anyone tried running a 10 twist? Looking at 300 rum choices and stick a 30 Sherman thru it and call it good if I buy a Browning X Bolt in a 9 twist or some the Remington Long Range in a 10 twist

 

[elkaholic]

Has anyone tried running a 10 twist? Looking at 300 rum choices and stick a 30 Sherman thru it and call it good if I buy a Browning X Bolt in a 9 twist or some the Remington Long Range in a 10 twist

I ran a 10 in my first one and it shot great with 225 eldm and 230 Berger

 

[Mudder500]

I ran a 10 in my first one and it shot great with 225 eldm and 230 Berger

That's good to know. I was hoping u had experience. You seem like the go to guy on it.

 

[elkaholic]

That's good to know. I was hoping u had experience. You seem like the go to guy on it.

I designed it

 

[Mudder500]

I designed it

I thought so but didn't wanna look like a goober? That being said could a 300wm Remington action be used with 3.850 mags?

 

[elkaholic]

I thought so but didn't wanna look like a goober? That being said could a 300wm Remington action be used with 3.850 mags?

certainly could. You need 3.750"

 

[357Max]

Have you had a chance to try the A-tips yet? Very curious about the 230's If they work well, I might scrap my hopes of running the 198 flatlines.

How does your free bore length compare to std prc saami?

I know Dave Tooley has been using a shorter free bore reamer on the PRC for the longer slick bullets.

Was going to build a 300 Sherman, but having second thoughts now, unless the A-tips work out?
I might go with the 300 max Sherman in a long action instead. The flatlines look like they'll be about 3.305 oal in the max. Would still need a really short free bore though.

Flatlines are probably going to be single load only in the 300 SM. They are 1.800 long
so 3.87-3.92 is what I'm guessing it would take to have a reasonable jump.

 

[elkaholic]

Have you had a chance to try the A-tips yet? Very curious about the 230's If they work well, I might scrap my hopes of running the 198 flatlines.

How does your free bore length compare to std prc saami?

I know Dave Tooley has been using a shorter free bore reamer on the PRC for the longer slick bullets.

Was going to build a 300 Sherman, but having second thoughts now, unless the A-tips work out?
I might go with the 300 max Sherman in a long action instead. The flatlines look like they'll be about 3.305 oal in the max. Would still need a really short free bore though.

Flatlines are probably going to be single load only in the 300 SM. They are 1.800 long
so 3.87-3.92 is what I'm guessing it would take to have a reasonable jump.
View attachment 165505

The 30 SM has about the same FB as the prc given the .005" neck difference.
I havent tried the Atips yet but am guessing they would work in a 3.8" box. The 230 Hybrids I run at 3.707"