SKS-FILES FORUM

Retail Products & Gunsmithing Services => Murray's Gunsmithing => Topic started by: Cz315 on November 25, 2020, 07:23:40 PM

Title: Headspace. To gauge or not to gauge, that is the question.
Post by: Cz315 on November 25, 2020, 07:23:40 PM

A general question.

In my [limited] experience with SKS I just shot them without worrying too much about headspace. Ignorance is bliss, I suppose. So far it worked out fine, knock on wood. Now, the two I have are decent looking ones with all matching numbers, maybe that's why.

What's your expert opinion, should one always check for headspace issues with milsurp (SKS in particular) just out of abundance of caution, or is it a potential problem with beaters, mismatched ones, etc? I have a no-go gauge for Mosins, but those are simple and inexpensive. I don't mind paying for it, but if I can avoid it - I'd gladly put the $ toward the new toys...

Title: Re: Headspace. To gauge or not to gauge, that is the question.
Post by: Larry D. on November 25, 2020, 11:31:23 PM

I've never headspaced a rifle in my life.

Title: Re: Headspace. To gauge or not to gauge, that is the question.
Post by: echo1 on November 26, 2020, 12:46:36 AM

I use a Romy go/no-go gage on builds where the bolt isn't from the receiver. PAX

Title: Re: Headspace. To gauge or not to gauge, that is the question.
Post by: xtriggerman on December 03, 2020, 08:31:26 PM

 The Tilting bolt on the SKS is the last gun you need a headspace gauge for.  Remove the firing pin and extractor. Make sure the chamber is clean. Grab a varied number 4 or 5 new cartridges. Remove the FCG from the receiver. Using only the striped bolt, put a new cartridge in battery and with a feeler gauge set, measure how much space is between the recoil shoulder and recoil edge of the bolt while only the bolt is in battery on a fresh cartridge. You should have about .004 to .008 at the most between the bolt and recoil shoulder in the receiver. Better if at the tighter side of .004 - .006 but heavy use can put these out past .008. Depending on chamber diameter, once you get much past .010 Case bulge will become more prevalent along with backing out primers. Confirm your head space with your different manufactured cartridges. Personally, Gauges have there place obviously, But knowing precisely how far back your cartridge is jumping at light off is the next level of intel on whats going on in front of your bolt. Love the SKS, FAL tilting bolt design.... :)

Title: Re: Headspace. To gauge or not to gauge, that is the question.
Post by: Cz315 on December 03, 2020, 09:04:48 PM

Thank you all! Lots of great info!

Title: Re: Headspace. To gauge or not to gauge, that is the question.
Post by: echo1 on December 03, 2020, 09:31:19 PM

I love feeler gauges. PAX