300 Norma Mag improved 245 berger EOL load

[sbruni]

Any worked up a 245 EOL… velocity, powder, charge, shoulder… mine is a 30* but please share regardless

 

[naja302]

I've got a 35 degree version with huge free bore and I load as a single shot for ELR so I imagine your load will be considerably lower. I'm running 92g N570 and my bullets are only seated about 1/2 way into the neck. Start low (like 82) and work up

 

[sbruni]

I've got a 35 degree version with huge free bore and I load as a single shot for ELR so I imagine your load will be considerably lower. I'm running 92g N570 and my bullets are only seated about 1/2 way into the neck. Start low (like 82) and work up

Thanks… What velocities/barrel length are you getting?

 

[naja302]

3060 fps with a 30" barrel

 

[COBrad]

Following

 

[Quicksilver338]

89gr n570, .025" neck tension, bullet seated .023" off lands, Lapua brass. 2960fps in a medium node and 26" proof barrel.

 

[Longrangers]

89gr n570, .025" neck tension, bullet seated .023" off lands, Lapua brass. 2960fps in a medium node and 26" proof barrel.

What twist are you running?

 

[Quicksilver338]

What twist are you running?

I knew I forgot something! 1:9 twist

 

[Longrangers]

I knew I forgot something! 1:9 twist

Ok thanks.
Considering building one with a 9 twist.

 

[Longrangers]

I knew I forgot something! 1:9 twist

Do you anticipate less barrel life with the N570?

 

[Quicksilver338]

Do you anticipate less barrel life with the N570?

I do, but it's a hunting rifle and if it makes it 1000 rounds I'll be happy. If it's less then it is what it is. If I don't play around with other bullets finding loads then it should last me quite awhile as is. Only shoot about 20-30 shots a year practicing before season. Another powder would definitely get you a little more life for less velocity.

 

[Longrangers]

I do, but it's a hunting rifle and if it makes it 1000 rounds I'll be happy. If it's less then it is what it is. If I don't play around with other bullets finding loads then it should last me quite awhile as is. Only shoot about 20-30 shots a year practicing before season. Another powder would definitely get you a little more life for less velocity.

Yeah
What is the size of groups you are getting? What brass are you using?

 

[Quicksilver338]

Yeah
What is the size of groups you are getting? What brass are you using?

Lapua brass, got about 450 or so rounds down the barrel now. Last time I had it out if shot a 4.3" five shot group at 976yds with the 245's.

I've been in the .2" group range at 100yds with both the 245 and 215 bergers. Seems to hold 1/2 moa out to the ranges I'll hunt with it.

 

[DirtNap35]

What speeds did you end up with using Berger 245? I've been looking at building one but a 28" tube. I'm hoping for 3050+. Considering 300 Terminator if NMi can't get there.