Gunsmithing Throat Reamer Question

[Etnie]

I recently purchased a Savage 10FP in .308 from a gentleman here on the hide. The ad said the following: " I used a throating reamer to push the throat back a bit to take advantage of the large inner diameter of the Savage DBM. I was loading 208 A-max to 2.980" and was .020" off and with 155s COAL should be about 2.9" to be the same distance off."

Well I am not really sure what all this means. Can anyone explain the real purpose of this operation?

I reload and I was planning on shooting 175SMK's from this rifle. Do I just reload the catridge's to the suggested overall length or do I reload them longer?

Is there anything else I need to be aware of since the throat was pushed back?

Thanks in advance for any replies! Jay

 

[Jkob]

Re: Throat Reamer Question

Iwould go back to the guy you bought it from and ask him. He probably throated it long to gain advantage with the longer bullets by increasing the powder space in the cartridge. What caliber is it?

 

[Etnie]

Re: Throat Reamer Question

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: gundoktr</div><div class="ubbcode-body">Iwould go back to the guy you bought it from and ask him. He probably throated it long to gain advantage with the longer bullets by increasing the powder space in the cartridge. What caliber is it? </div></div>

sorry, .308

 

[ChadJamesR]

Re: Throat Reamer Question

Accuracy with most typical rounds differ with the different distances they have to travel before making it to the lands in the barrel. For instance, most SMK bullets typically like to travel .02" before they come in contact with the lands of your rifled barrel. This means you will want to load your rounds so that they are seated .02" aways from the lands.

What you need to do is measure how long you need to load your rounds so that the bullet touches the lands. Hornady has a kit for this. Once you know this dimension, you can adjust how long you load your rounds to get best accuracy.

If you have any questions, fell free to PM me.

Chad