Author Topic: .257 Monocoque PCP  (Read 1874 times)

Knife

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Re: .257 Monocoque PCP
« Reply #15 on: May 11, 2017, 06:35:16 PM »
Bob;

I Know you've got to be a very happy man!  And I am quite happy for you. :D

In your testing, what did your barrel slug at, and what dia. bullet worked the best for you. Both in accuracy, and velocity.

Knife
  • Gatesville

rsterne

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Re: .257 Monocoque PCP
« Reply #16 on: May 11, 2017, 08:16:40 PM »
The barrel slugged out at 0.257" groove (0.248" land), and it looks like 0.257" or a bit bigger will be the best bullet diameter for accuracy.... However, the 0.256" bullet is about 10 fps faster, and the 0.258" about that much slower (and harder to chamber for the last 1/8").... I may try sizing some to 0.255" just to see what happens....

Bob
  • Coalmont, BC