300wsm head space question
I know this has been talked about time and time again, but just want a little assurance. I used a sized 300wsm brass to set the headspace. Closed with just a little extra pressure. I then put a small piece of masking tape on the brass and rechecked. Closed but with much more force. Am I close?
Re: 300wsm head space question
Sounds like you're there to me.....
:D
Re: 300wsm head space question
Thanks. Is maskint tape too thick?
Re: 300wsm head space question
The masking tape is probably to thick. Most guys use cellophane tape like 3M makes.
El Lobo
Re: 300wsm head space question
So it should close with firm pressure with the cellophane
The resized brass closes in my other action with much more difficulty. It wasn't shot in that action is that normal?
Re: 300wsm head space question
Your brass should be shot in the same action. The paper should be 2 thousandths thick for checking closing.
Re: 300wsm head space question
Brass shot in my factory chambered 300 WSM (Savage) will not chamber in my friends A-Bolt. Should not be a problem as long as you dont take the wrong ammo hunting with you. It would suck to get out in the field and find that your rounds wont chamber.
Re: 300wsm head space question
Quote:
Originally Posted by grouse
Thanks. Is maskint tape too thick?
Yes, use Scotch "transparent", .002x". I forget what other tapes measure.
My 280 Rem GO ( purposely made to 2.100 instead of 2.099)
http://i44.tinypic.com/2iw63x4.jpg
The same gage with a single layer of transparent tape.
http://i39.tinypic.com/2jczvac.jpg
A fired piece of brass from the chamber setup with the bare and shimmed gage.
http://i41.tinypic.com/2e1yrfn.jpg
The same case FL sized with a .002" bump. 2.099" is the SAAMI minimum chamber spec for the 280 Remington.
http://i40.tinypic.com/295x0eq.jpg
Standard gage spec for the 280 rem is 2.099 (Go) and 2.105" ( No Go), .006" tolerance.
Remember, a GO gage is used to set the chamber "equal to or greater than" and the No GO "Less than". If the bolt won't close on the No Go the chamber length must be something less than the gage length. If it closes on the GO, its something equal to greater than the gage length. The difference is the actual chamber length be it .003" for some cartridges oras much as .006 for others.
Quote:
Closed with just a little extra pressure. I then put a small piece of masking tape on the brass and rechecked. Closed but with much more force.
Actually, when setting-checking headspace the bolt should close on the GO, but not the NO GO WITH NORMAL PRESSURE! Fact is, when its out of room...its out of room and all you may have accomplished was creating something shorter. Sizing the might be the next problem you run into, your FL die may be short enough to bump the shoulders enough.
If you want to see the correct method using gages (brass) , watch Gordy Gritters checking headspace , 1:30 to 2:20.
http://www.youtube.com/watch?v=KICBv...eature=related
Bill
Re: 300wsm head space question
just decided to order the gauges and do it right. thanks
Re: 300wsm head space question
Re: 300wsm head space question
BillPa Thanks for the great info!!!
Re: 300wsm head space question
I got the head space gauges for the wsm and got this gun headspaced properly. Just out of curiosity I put the gauges in my factory 300 wsm that I have been shooting for 5 years with no problems. There have been No modifications at all to this gun. The bolt closed on the go and the NO GO gauge with no trouble at all. Makes me wonder about the tolerances of needed for head space.
Re: 300wsm head space question
if you sized your brass then used it for a go guage all you did is set it to what your die is set at and that is fine if you only load for that one rifle.
every one worries about head space too much.
read the test that P O ackly did with the barrel unsrewed one full turn.
As long as your die and the chamber head space are the same there is nothing to worry about no matter what length it is