300 sherman build

[ramrod79]

Yea it's hard to beat his standard actions. That 225 should be some bad down range medicine. I think Len should make a Sherman section so it's easier to track all the good data and info.

 

[huntinherrrington]

So I'm ordering some powder. Hoping to find a temperature stable powder but im not against having summer and winter loads either if the velocity and accuracy is there.
Anyone else with a 300 Sherman pushing heavies? What powders are you using?

300 Sherman
30" Bartlein 1:9
225 ELD-M

Here is the powder list to order so far
IMR 4955
IMR 4831
Norma MRP
RL 22
RL 26
Ramshot Hunter
H4831sc
Hybrid 100v
4000-MR

 

[elkaholic]

So I'm ordering some powder. Hoping to find a temperature stable powder but im not against having summer and winter loads either if the velocity and accuracy is there.
Anyone else with a 300 Sherman pushing heavies? What powders are you using?

300 Sherman
30" Bartlein 1:9
225 ELD-M

Here is the powder list to order so far
IMR 4955
IMR 4831
Norma MRP
RL 22
RL 26
Ramshot Hunter
H4831sc
Hybrid 100v
4000-MR

I would add RL23
With the 225 I think RL26 will give top velocity. But 23 might not be too far behind.

 

[codyadams]

On a side note for future reference -

A cheap tool to make for opening up the barrel channel is a few wooden dowels, then get the peel off sticky back grinding disks and put a few on a 20"-30" section. I have a few different sizes for opening up different sized barrel channel. I haven't had to open enough barrel channels yet to make me decide to get a channel cutter....ha ha. Anyway, tag. I like the 300 Sherman cartridge, think it would make fantastic elk medicine.

 

[huntinherrrington]

I have used wooden dowels in the past but seems they have grown legs. I couldn't find them. It actually wasnt bad at all like i thought it would be. I wasn't using a vise. I held it in one hand and sanded with the other. 100 grit made quick work. I thought it was going to take alot more opening than it actually took.

 

[cjl2010]

Yea it's hard to beat his standard actions. That 225 should be some bad down range medicine. I think Len should make a Sherman section so it's easier to track all the good data and info.

I agree. If we have a section for the ridiculous 7stw we should have one for the shermans!

 

[DocDoc]

Sand paper wrapped around a socket works well for opening up a stock.

 

[Idaho Trecker]

Good list of powders to try. Like rich said 23 will be good also. 22 and mrp were the exact same when I tried them in my 300ss but they are not temp stable. I am glad to see you finish this build after your messages last year inquiring about that and my 300ss. Might want to add rl 16 and/or 17 but 17 hasn't been great for temp for me.

 

[huntinherrrington]

I will def add rl6 & 23. Wasnt going with 17 due to temp issues. I know rl22 has temp swings also but i wasnt aware of it being the same as MRP with your results. I have a couple of weeks to decide what to order. I leave in a few days for 2 weeks to go to work.

 

[huntinherrrington]

Action screws were delivered yesterday and the orings for my hydro form die are out for delivery for today. So finally after 2 years i will officially have a complete rifle and should be able to form brass!!!!!!!!! I think i should celebrate by buying a new scope!

 

[Idaho Trecker]

That sounds like a good plan!!! What scope are you putting on that bad boy?

 

[huntinherrrington]

Well i want Swarovski x5 5-25x56 but I'm most likely going to get Leupold VX6-HD. I'll just have to see. Depends on how long i can hold out. I have a Vortex PST and a Mark 4 as spares right now so i need to just use one of them for a while and then get the x5.

 

[Idaho Trecker]

I run that swaro on my 300 ss and it is amazing!!! I have a couple of the Leupold VX5hd and they are very impressive as well. I have a Mark 5 hd MOA on order right now but no idea when it will actually ship.

 

[huntinherrrington]

I really open to anything as long as it is equal to or higher quality of VX6-HD.

Good glass, repeatable turrets, zero stop, etc