Curious question

[darrindlh]

Sounds like you're looking for a 300 RUM??

No sir, I am not looking to purchase a RUM. Amazing round though.

Darrin

 

[asd9055]

If we keep the .361 of free bore, then we can increase the powder capacity and hopefully keep the pressure down. The thread on the nosler forum talked about having a normal 30 cal chamber. As the weatherby factory loads were to hot.
Again just brainstorming. Waiting on PTG and the reamer.

Darrin

I don't know what the thread on Accurate shooter is talking about, I never modify, I buy what I want and leave it at that. Except for muzle brakes, or as @memtb likes to call them, weedburners

 

[Calvin45]

I stand corrected. He can explain it as it is his.

Has anyone seen him around lately? I sent him a message a while ago and got no reply. Don't recall seeing him recently either. I hope he's doing okay.

 

[Calvin45]

I don't know what the thread on Accurate shooter is talking about, I never modify, I buy what I want and leave it at that. Except for muzle brakes, or as @memtb likes to call them, weedburners

Weedburners or speed holes to make the gun go faster

 

[asd9055]

Has anyone seen him around lately? I sent him a message a while ago and got no reply. Don't recall seeing him recently either. I hope he's doing okay.

He was on earlier today

 

[asd9055]

Weedburners or speed holes to make the gun go faster

It's not about speed, it is about saving your suspension and enjoying a longer ride

 

[FEENIX]

.300 ackley, .300 Jarrett, I think feenix made some version of it he called a .300 LARA.

Nope I dug up some old threads, it's a .300 Jarrett / ackley case with a 37.5 degree shoulder.

You are correct. The .30 LARA is based on the .375 H&H parent case and has a 37.5° shoulder angle, while the .300 Jarrett has a 35° shoulder angle. There are slight differences in the neck dimensions/FB, but they are very close.

.300 WBY vs .30 LARA

Side-by-side picture comparison - best I can do.

.300 WBY Improved/.300 Ackley vs. .30 LARA.

 

[darrindlh]

That is impressive!!

 

[FEENIX]

Norma magnum improved

My .338 Thor is a .338 NMI, except I made the neck shorter and the shoulder angle 45°.

.338 NM vs. .338 Thor,

 

[memtb]

If we keep the .361 of free bore, then we can increase the powder capacity and hopefully keep the pressure down. The thread on the nosler forum talked about having a normal 30 cal chamber. As the weatherby factory loads were to hot.
Again just brainstorming. Waiting on PTG and the reamer.

Darrin

Or…….shoot Barnes bullets. They are often pretty darn happy to be set back off of the lands a ways. Plus in equal weight to cup and core they are longer, with can give a win - win. More bullet in the case and closer to the lands if desired!

Just a thought! memtb

 

[darrindlh]

My .338 Thor is a .338 NMI, except I made the neck shorter and the shoulder angle 45°.
View attachment 557772
.338 NM vs. .338 Thor,

Okay I know this is a stupid question, but when I create the 40 degree angle shoulder and fire form brass will it decrease the neck of the original case? Or will additional steps be needed

 

[MagnumManiac]

Would creating a 40 degree shoulder and blowing out case taper on my 300 weatherby improve on performance? Even 100-150fps?

Darrin

Nope.

Cheers.

 

[Phil Rizzo]

What % capacity gain is necessary to be "worth doing"?

 

[FEENIX]

Okay I know this is a stupid question, but when I create the 40 degree angle shoulder and fire form brass will it decrease the neck of the original case? Or will additional steps be needed

Are you referring to my .338 Thor? Please be specific so I do not misconstrue your question. If you are referring to my .338 Thor, yes, the neck will be shorter, as will the OAL because it is by design (spec reamer). If you refer to the picture in #6, yes, because you remove the WBY double radius. Below is a .270 Win and .270 AI.

The neck is longer because the shoulder junction is shortened - changed in datum reference. This will create a tight-fit chambering when you load a .270 Win to a rifle chambered for .270 AI - shoot it fire-form - and you're done. Hope this helps