Question about Freebore and 300 WSM

[BoiseDoc]

I am about to chamber a 300 WSM barrel with the idea of a short rifle for do all western hunting. I see people talk about the .200 - .225 freebore and there is apparently a target reamer with .280 freebore. The SAAMI pic looks like the SAAMI spec freebore is .188. The two bullets I am currently considering are the 212 eldx which has a LONG bearing surface, .626 I believe and the 181 Hammer hunter with a bearing surface of about half of that. If I ever wanted to shoot factory bullets then I assume a long freebore would make most inaccurate. So I feel like I should either just go SAAMI spec or .200. If I actually throated the chamber for the 212 eldx boattoal base at the shoulder/neck junction then it would be a LONG freebore; more like the .280. Thoughts?? Do you just pick a bullet and do it?

 

[amassi]

Set your Freeborn to that eld, load a couple days rounds and send them to your gunsmith cutting the throat
Most factory bullets will shoot just fine out of a longer throat save for some berger and sierra bullets. Typical fodder like an accubond et el will shoot fine and some monos like barnes, hammer etc shoot better with a bit of jump

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[XLR]

Like he said, pick what you are going to be shooting the most and build the rifle around that! Weatherby's have a huge amount of freebore and they still seem to shoot pretty well! You could always go the middle ground and do a .2 and just throw the ELD in the case a little further!

One other consideration on this is your mag length. If you are running in a short action, I would test the length you will be able to achieve before having it throated! Nothing worse than getting it back and then your rounds wont fit in your mag!

 

[BoiseDoc]

Thanks to you both. It’s on a long action BAT. And the Mag is one of yours sir. XLR 300 RUM mag. No length restriction

 

[amassi]

Thanks to you both. It’s on a long action BAT. And the Mag is one of yours sir. XLR 300 RUM mag. No length restriction

Then I'd 100% build a eld-m dummy at the neck shoulder junction and send it to my Smith. Sounds like a cool build

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[Lucasraymond]

Then I'd2” 100% build a eld-m dummy at the neck shoulder junction and send it to my Smith. Sounds like a cool build

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This is exactly what I ended up doing with badlands bd -195 in my XM action (3.2” COAL)