Its my first time reloading for the 40 cal, and the first batch has a leading problem.
First the load info.
Firearm: SA SD40
Cal 40 s&w.
Boolit:
Composition-straight ww, water dropped.
Lube- tumble lube, LLA before sizing.
Design- lee 178gr TC
Hardness (brinell) 13.5.
Sized- yes, lee .401 sizer
Cases.
Brand-Speer range brass.
Recipe:
4.5 gr Alliant "Universal" (with the pistol on the can)
Win small pistol primer.
OAL: 1.30
Ok, now the problem.
Description:
Lead deposits through entire barrel on lands and heavily in grooves after 25 rounds- cleanable with jacketed rounds.
Any ideas on what is going wrong here? Presently I am re-lubing with LLA to test in a couple of days.
If this does not help I Will lower the charge a bit (although recoil is normal to light)
I have another batch of boolits I rejected as "too soft" which came from donated mystery lead and rated 8.0 brinell. I may try a few just to see if Im running too hard.
Usualy straight ww and the single lla lubing works for me (that is, in my .38 spl loadings) so I am slightly stumped.
Thanks for the help