Mountain Molds
Designing a Bullet to Work in the Star Lube-Sizer
If you want the grease groove center-to-center spacing to be
0.08"
0.09"
0.10"
0.11"
0.12"
0.125"
0.13"
0.14"
0.15"
0.16"
0.17"
0.18"
0.19"
0.20"
0.21"
0.22"
0.23"
0.24"
0.25"
0.26"
0.27"
0.28"
0.29"
0.30"
And the groove-to-band length ratio (
GtoB
) is
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
2.0
3.0
Then choose a band length close to
That's all there is to it !