10mm cast boolits dia. ?

[Willbird]

I have a friend that wants me to cast some 175 grain TC boolits for his 10mm, what dia will work out best ?? It is an EAA witness pistol.


Bill

[Johnch]

Same as my 40 S&W .
.401
I have tryed .402 with no noticable differance .

Johnch

[9.3X62AL]

I use .401" sizing, hard alloys, and soft lubes (Javelina, mostly) in my S&W 10mm and Beretta 40 Short & Weak. The 1-10" twist rates in some 40 S&W pistols can complicate cast boolit shooting just like the 9mm's. My M-1026 has 1-16", which seems to be the "majority" twist rate in the 10mm's. This is an unusual pitch for S&W handguns, and is more often seen in Colt products.