General Throat Question

[RuttyRizzler]

Is extending the throat on a 300 wsm function similar to the prc chambers in that bullets are seated longer to take advantage of case capacity? If so, if a throat is reamed .100 longer than saami can it still physically shoot factory ammo?

 

[Coyote Shadow Tracker]

Is extending the throat on a 300 wsm function similar to the prc chambers in that bullets are seated longer to take advantage of case capacity? If so, if a throat is reamed .100 longer than saami can it still physically shoot factory ammo?

Not really sure what you are really asking about having a longer throat than SAAMI and where you are getting that from. If you ream the throat longer in your chamber you will just have more Freebore. Now whether your Factory Ammo will like the longer Freebore for accuracy is questionable.

 

[Critter Picker]

You will be able to shoot factory ammo, but as Len stated,your accuracy my be compromised. The only way you can be sure would be to try it,but once you increase your throat there's no going back.

 

[Gabe22BR]

Increasing throat length allows for longer bullets to be seated , or jammed into the lands… since most factory barrels have SAMMI spec, factory ammo is set to mag length-
Given time the throat will get longer on its own, .. Carbon ring will build/ form , then you'll have pressure problems, or false chamber length, causing you to trim brass shorter to get a round that " used to go in"

 

[RuttyRizzler]

Not really sure what you are really asking about having a longer throat than SAAMI and where you are getting that from. If you ream the throat longer in your chamber you will just have more Freebore. Now whether your Factory Ammo will like the longer Freebore for accuracy is questionable.

Thanks for answering my question. My first question was in regards to the new PRC design. I was reviewing some SAAMI diagrams of the 300wsm and new PRC rounds, It looked like the PRC diagrams have more built in freebore compared older cartages.

 

[Varmint Hunter]

The first thing you need to consider is what your magazine will accommodate, as far as OAL of the ammo. If you lengthen the freebore to accommodate ammo with the bullets set out, will they still fit in the magazine?

If you lengthen the freebore and are not happy with it, you can always set the barrel back a couple of threads and rechamber to SAMMI specs.

 

[RuttyRizzler]

The first thing you need to consider is what your magazine will accommodate, as far as OAL of the ammo. If you lengthen the freebore to accommodate ammo with the bullets set out, will they still fit in the magazine?

If you lengthen the freebore and are not happy with it, you can always set the barrel back a couple of threads and rechamber to SAMMI specs.

I built from a tikka, added a LA bolt stop and HCA magazine. I'm good to load to 3.3 ish. I like the idea of using the entire case capacity for powder but this sounds like an expensive gamble for a few more fps.