09-29-2018, 12:02 AM
A5BLASTER Wrote:I'm no expert and haven't been loading my own for very long but I would totally and whole heartly advice against doing this are telling others to do this.
There are probably hundreds of threads on this fourm alone of issues guys have had trying to run .125 bolt in a chamber cut for the headspace of the mrk136 bolt.
To be honest to me I think your playing with fire doing this.
Not saying I'm right but everything I have read and come to understand is you never mix the two bolt face depths up.
Read my post more carefully. I'm not telling others to do this. I said you "may be able".
If you know what head space is and have the knowledge and tools to measure it, then based on what your brass, bolt and chamber dimensions are, compare new brass and after firing. If you think you have excessive head space, say it is .009 as DCM has said he "may be able" to bump the shoulder down on his new brass and use a .125 bolt that gets rid of that .009 head space.
I have 3 lots of new brass right here in front of me, Lapua, Hornady and Starline. The shoulder to base varies from each brand by .007. Do the math. Take what you have, measure it and figure it out. All bolts, brass and chambers are different by a few thousands here and there.
I run a .125 bolt with Lapua no bump, Hornady I bump. Starline the .136 bolt no bump. Go figure.
Of course I'm playing with fire, it comes out the end of the barrel.
