Has anyone tried the Hornady 140g hpbt vintage match in their M96? I bought some to try and went to the range yesterday. Shot for comparison to the other commercial ammo I had, i.e. ppu sp, fmj and the 120g hpbt match. The Hornady shot the best group by far, all four in the 10 ring at 100 yards, before I noticed that the cases were bulging just above the case head. Oops! I figured this ammo was made for the M96, but in checking my new Lyman 49th, none of their loads for 140g hpbt go to the 2600fps that Hornady lists for this ammo. Thoughts?