Trimming Case Length

[MN XringChasinFool]

Anyone else notice this or is it just me, but i do all my case prep by hand, no power tools or case prep centers, yup it takes time but I don't mind. So I trim my .308 Hornady Match brass to 2.005, but I've noticed after I trim to 2.005 and smooth (chaffer) the outside and inside, then remeasure, it 99% of the time goes back to 2.006. So now I've been trimming to 2.004 then doing the edge smoothing, measuring again and getting my 2.005. Just me ? or anyone else have this happen and notice this ?

XChasn,

 

[itchyTF]

If the cutters aren't sharp you may be moving the brass in addition to cutting. But personally I wouldn't worry about .001" on case length variation.

 

[brian427cobra]

Welcome to the Forum, 2.005 for 308Win is too short, that is book minimum, this tool will tell you exactly what your trim length is, http://www.sinclairintl.com/.aspx/pid=32925/Product/Sinclair-Chamber-Length-Gage I suspect that when chamfer in/out that a small burr is left giving you the .001, a twist or 2 on some 0000 steel wool should take care of it, I don't shoot BR and I wouldn't worry about it, I know I can't shoot the difference of .001 trim length

 

[markm87]

I agree... It's not earth shattering, but it's a little short. I like to run mine at about 2.008 to 2.009 or so.

I actually haven't trimmed in a while. I might bust the LE Wilson out and uniform some brass this week.

 

[Leaddog]

I trim all my.308 to 2.005. I've never seen an accuracy difference with them or the ones I let go to 2.010. I prefer shorter necks. YMMV.