River700
I don't claim to be a ball driller, but I know which drills that I like. I don't know what speed you throw at, but if you are looking for smooth length in a drill. Check out the 5.5" drill, with pin close to the val.
BrunsNick uses it in his vid of the Copperhead on another thread, on this site.
Remember too, that the Orbiter core is a very strong core. So most probably you won't be losing a lot of punch, when you drill the Neptune for length.
This also means your pin will be a lot higher over your fingers than normal.
Just my two cents.
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