TwoEyedJack
Member
I am developing some new loads for a Savage 12FV in .22-250. This rifle seems to have a pretty long throat. I have one load using a 40 gr. ballistic tip that shoots pretty well but requires the use of IMR4064 which does not meter well in my Dillon powder measure. I have tried several ball powders, including Win760, H380, and AA2460 with mediocre results, i.e. about 9/16" to 1 1/16, averaging 3/4" for three shot groups. 4064 consistently gives about 3/8" @ 4000 fps.
So I got out my handy Stony Point OAL gauge and found that I could not seat the 40 grainers anywhere close to the lands. I have three kinds of 55-60 grain pills laying around, and calculated that I could seat to the lands with the following seating depths:
Sierra 55 gr. spitzer, 0.0925"
Hornady 55 gr. SP, 0.1520
Hornady 60 gr. SP, .2160
I have always heard that you should seat bullets at least one diameter deep, or .223" for a .22-250. If I went a few hundredths off the lands, that would help. Has anybody tried using loads with only .1" seating depth? I worry about sufficient neck tension for consistent ignition, not to mention mechanical strength.
So I got out my handy Stony Point OAL gauge and found that I could not seat the 40 grainers anywhere close to the lands. I have three kinds of 55-60 grain pills laying around, and calculated that I could seat to the lands with the following seating depths:
Sierra 55 gr. spitzer, 0.0925"
Hornady 55 gr. SP, 0.1520
Hornady 60 gr. SP, .2160
I have always heard that you should seat bullets at least one diameter deep, or .223" for a .22-250. If I went a few hundredths off the lands, that would help. Has anybody tried using loads with only .1" seating depth? I worry about sufficient neck tension for consistent ignition, not to mention mechanical strength.