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300 WSM freebore

jake6547

Sergeant
Supporter
Full Member
Minuteman
Jul 28, 2011
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Just curious guys, Ive been getting some different answers about what freebore reamer to get. Ill be using the alpha wsm mags and shooting 168-190 berger vlds. One person i talked to today said zero and the other said .093? Kinda confused and cant find anything on the internet.
 
Re: 300 WSM freebore

Are you trying to choose between some off-the-shelf reamers, or reamers your smith has on hand....or are you trying to spec out a reamer to have made?

If you're speccing one out, I recommend you just load up a few dummy rounds and send them your cutter grinder.

Otherwise, you really oughtta buy a bullet comparator so you can directly measure your own dummy round.
 
Re: 300 WSM freebore

I got a PTG 300WSM with .210 freebore to shoot the 210gr Bergers. I like the 300WSM in a long action better so I don`t have to seat bullets deep taking up powder space and take full potential of the cartridge.
 
Re: 300 WSM freebore

im trying to find the best reamer to order from ptg for a new build. I already have a wsm short action and stock so im kinda limited as far as a o.a.l goes.
 
Re: 300 WSM freebore

If i was to checka round on a comparator how would i know what freebore i would need. I plan on shooting HSM ammo. fyi
 
Re: 300 WSM freebore

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: jake6547</div><div class="ubbcode-body">If i was to checka round on a comparator how would i know what freebore i would need. I plan on shooting HSM ammo. fyi </div></div>

If you zero your caliper on an empty case, then close the caliper on a loaded round (with comparator), you'll now be measuring the distance from the casemouth to the ogive.

Freebore equal to the above measurement will put that cartridge right "on" the lands.
 
Re: 300 WSM freebore

turbo thanks i never knew how to measure that.
 
Re: 300 WSM freebore

HSM ammo is going to be loaded around a SAAMI chamber for freebore.
 
Re: 300 WSM freebore

im not tring to sound dumb but what is the saami standard freebore, its not on there website or i missed it.
 
Re: 300 WSM freebore

cool so im getting .188 does that sound right
 
Re: 300 WSM freebore

I would call Dave at PT&G to make sure you get what you want. He will set you straight.
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Regards, Paul
 
Re: 300 WSM freebore

found out to calculate your freebore without using a comparator. Take max clip length subtract OAL of your brass, then the nose length of the bullet you want to use and theres your freebore! Fyi i found the info on the berger web site about on the specs of a 185 hunting vld.