Narrowed it down 338 RUM and edge

[Jmort1754]

Will be on a 700 long action

Smith will do the work of making a Wyatt's box fit

Just go all the way to the edge ?

250-300 grain pills

Anything that walks in the states is my goal

 

[hereinaz]

How far are you going to shoot to kill something?
What velocity do you want?

Its an academic exercise, IMO. If you don't need the extra juice of the Edge, then go with the RUM.

 

[XLR]

Go with the 300 NMI IMO. Shorter cartridge with similar velocity due to Lapua bolt face so it does not limit you on COAL when you want to run the heavies.

 

[Jmort1754]

Go with the 300 NMI IMO. Shorter cartridge with similar velocity due to Lapua bolt face so it does not limit you on COAL when you want to run the heavies.

So just have my bolt opened up is that what you're saying ?

 

[Jmort1754]

How far are you going to shoot to kill something?
What velocity do you want?

Its an academic exercise, IMO. If you don't need the extra juice of the Edge, then go with the RUM.

Looking at game to 800. I know I can do that with my prc but like the extra oomph of a 338.

 

[Jmort1754]

How far are you going to shoot to kill something?
What velocity do you want?

Its an academic exercise, IMO. If you don't need the extra juice of the Edge, then go with the RUM.

Looking at game to 800. I know I can do that with my prc but like the extra oomph of a 337

 

[hereinaz]

Velocity is low, IMO for the 338 edge shooting a 250 per Berger's website. They have load data for both cartridges and both 250 and 300.

If it were me, I would build a 300 Sherman Mag shooting 225s or if you are dead set on the 338 bullet, then check out his 33 Sherman offerings. I would do the 33 Sherman Mega

His short fat cartridge design get some serious performance with less powder. My 7ss load got 100 fps higher velocity than my 7 rem mag, with 6 grains less powder, same lot of bullets and H1000. I will have my second Sherman barrel in 25 SST coming soon, and I know many people who are running the Sherman cartridges and are very, very happy with them. They cost a little more to get into, but it is pretty turn key.

If you want the name of smiths that I know are making them, let me know.

338 SHERMAN

Guys. Here is some very impressive info on the 338 Sherman. Jace ran some Superformance through his 25" Bartlein 5r this week with both the 285 ELDM and the 250 Berger. Past data from 4 different rifles have all been close with RL17 and H100v so I have no reason to doubt these numbers. All done...

www.longrangehunting.com

https://shermanwildcatcartridges.com/mega

 

[XLR]

Velocity is low, IMO for the 338 edge shooting a 250 per Berger's website. They have load data for both cartridges and both 250 and 300.

If it were me, I would build a 300 Sherman Mag shooting 225s or if you are dead set on the 338 bullet, then check out his 33 Sherman offerings. I would do the 33 Sherman Mega

His short fat cartridge design get some serious performance with less powder. My 7ss load got 100 fps higher velocity than my 7 rem mag, with 6 grains less powder, same lot of bullets and H1000. I will have my second Sherman barrel in 25 SST coming soon, and I know many people who are running the Sherman cartridges and are very, very happy with them. They cost a little more to get into, but it is pretty turn key.

If you want the name of smiths that I know are making them, let me know.

338 SHERMAN

Guys. Here is some very impressive info on the 338 Sherman. Jace ran some Superformance through his 25" Bartlein 5r this week with both the 285 ELDM and the 250 Berger. Past data from 4 different rifles have all been close with RL17 and H100v so I have no reason to doubt these numbers. All done...

www.longrangehunting.com

https://shermanwildcatcartridges.com/mega

What he said would be a great option too and that way you do not have to worry about opening your bolt face to Lapua! The Rum and Edge are cool but they are one of the most inefficient cartridges out there! Rich has a Facebook page too (sherman wildcat cartridge group) and he is always posting on there!

 

[hereinaz]

What he said would be a great option too and that way you do not have to worry about opening your bolt face to Lapua! The Rum and Edge are cool but they are one of the most inefficient cartridges out there! Rich has a Facebook page too (sherman wildcat cartridge group) and he is always posting on there!

Rich Sherman is the Ackley of our era. Bottleneck cartridge design has used inefficient case configuration for reasons other than performance.

There are drawbacks to the shape on paper, depending on your view, like feeding. But internal ballistic performance can’t be matched per grain of powder and the efficiency translates into highly consistent performance and loading.

 

[762 ULTRAMAGA]

Will be on a 700 long action

Smith will do the work of making a Wyatt's box fit

Just go all the way to the edge ?

250-300 grain pills

Anything that walks in the states is my goal

You're really going to need a 4" mag with the edge or RUM shooting 300 grainers, 250 bergers would work in a 3.850 box.

I would take the Sherman data with a serious grain of salt, having owned one I can promise you that the claimed numbers are done at very high pressures.
There's no way around it, a case with 5 or even 20 grains less capacity is never going to compete at the same pressures.

If you're wanting something more efficient that still puts up good velocity, and fits in a standard mag box check out the 33 Nos.
Peterson is making brass for it now which is a huge game changer.

 

[Wyobohunter]

I’d take either. I have the .338 RUM. Brass will probably be a little easier to find for the RUM.

 

[coues craze]

338 edge +p by defensive edge. It’s one of my favorite rifles.

 

[hereinaz]

You're really going to need a 4" mag with the edge or RUM shooting 300 grainers, 250 bergers would work in a 3.850 box.

I would take the Sherman data with a serious grain of salt, having owned one I can promise you that the claimed numbers are done at very high pressures.
There's no way around it, a case with 5 or even 20 grains less capacity is never going to compete at the same pressures.

If you're wanting something more efficient that still puts up good velocity, and fits in a standard mag box check out the 33 Nos.
Peterson is making brass for it now which is a huge game changer.

33 Nosler is a solid choice as well.

I will disagree respectfully. Not sure what your experience was with the one Sherman you had was, but that hasn't been mine with my one rifle, the others that I have done load development for, or the experience of many others I know personally. But, I do know someone who had a very bad Sherman build. It pressured out very early and could never get the velocity. He worked load development like crazy, but it turned out to be the barrel. And, I've seen some barrels that are slower than expected from people I know.

Efficiency is real, and a difference of 5 to 20 grains less capacity can still result in unexpected velocities. There are all sorts of reasons for that because it is the way the pressure develops and spikes, not the total powder burn.

A real world example is the 33 Nosler. The 33 Nosler at 88.3 grains of case capacity has about 3.3 grains more capacity than the 338 Mega. The 338 Lapua has a capacity of 116.25 grains. but, the 33 Nosler gets about the same velocity of the Lapua with 18% less powder.

Case design does make a difference, the 33 Nosler and Sherman lines have shown it.

There are people out there in the real world testing and giving data on them, but they are relatively new. I know there are quite a few in the FB group that have built the 338s. Call Robert Vestal of Vestal Customs about the Shermans he has built. Pretty sure I saw he's built a few 338s. He knows big bore rifles.

https://hammerbullets.boards.net/thread/548/custom-ammo?page=1

In the end, just some options to consider if one is going to go with a wildcat like the 338 edge.

 

[762 ULTRAMAGA]

33 Nosler is a solid choice as well.

I will disagree respectfully. Not sure what your experience was with the one Sherman you had was, but that hasn't been mine with my one rifle, the others that I have done load development for, or the experience of many others I know personally. But, I do know someone who had a very bad Sherman build. It pressured out very early and could never get the velocity. He worked load development like crazy, but it turned out to be the barrel. And, I've seen some barrels that are slower than expected from people I know.

Efficiency is real, and a difference of 5 to 20 grains less capacity can still result in unexpected velocities. There are all sorts of reasons for that because it is the way the pressure develops and spikes, not the total powder burn.

A real world example is the 33 Nosler. The 33 Nosler at 88.3 grains of case capacity has about 3.3 grains more capacity than the 338 Mega. The 338 Lapua has a capacity of 116.25 grains. but, the 33 Nosler gets about the same velocity of the Lapua with 18% less powder.

Case design does make a difference, the 33 Nosler and Sherman lines have shown it.

There are people out there in the real world testing and giving data on them, but they are relatively new. I know there are quite a few in the FB group that have built the 338s. Call Robert Vestal of Vestal Customs about the Shermans he has built. Pretty sure I saw he's built a few 338s. He knows big bore rifles.

https://hammerbullets.boards.net/thread/548/custom-ammo?page=1

In the end, just some options to consider if one is going to go with a wildcat like the 338 edge.

I'm not against the Sherman cartridges but here's a fact, blowing the shoulder out to 40 degrees reduces bolt thrust and one can push pressure much higher before conventional p signs show up.
There is no replacement for capacity it's as simple as that, again I really like 40 degree shoulders but I don't go into it with ridiculous expectations.

BTW the 33 nos capacity is not 88 grains, that's noslers data below the saami seated bullet depth. They list the 28 and 30 nos the same way, actual capacity is a few grains less than the 30 nos, which is around 99 grains with peterson brass.
The 338 lapua throated properly will beat a 33 nos by at least 100- 150 fps, according to data I've compared from handloaders.

 

[Totoro]

I am rolling 338 RUM +P from DE and no complaints.

 

[Flyjunky]

why not just go all in for a 33xc or 33 enablr?

throwing a 300gr Berger at 3300 would be some serious medicine, not a lot of wind correction with that combination.

Just kidding....either the edge or rum will be fine, just depends on if you want to reload or not.

 

[The Fish Box]

Game at 800 just go with the rum or Nosler if you don’t want to reload it and the edge if you want to reload and get a little more oomph.