Mauricio.... I doubt if the 17.7" twist LW would handle the 51 gr. BBT....
Mauricio, could you share the link for that page that's in English?Thanks.
Quote from: rsterne on June 17, 2017, 10:04:51 PMMauricio.... I doubt if the 17.7" twist LW would handle the 51 gr. BBT....Hi Bob... what would be the best twist for the 51 BBT to achieve 950 fps? Regards
I do not see any allowance on the Berger calculator to input the boattail dimensions.... Boattails require a faster twist....http://www.geoffrey-kolbe.com/barrel_twist.htmBob
I rather doubt you can get the FPE you need without using a Cothran valve, which is my plan.... There would not be much use in regulating it for a 6mm, so you would be limited to a few shots, and the declining velocity that occurs with that valve.... I don't know enough about the Cobra valve to comment if it could be used unregulated at over 100 FPE.... Bob
Tom, I should have read the rest of your post.... I just read the first line, so my response was based on "modified MRod", thinking of starting with the regular tube and a 3000 psi fill.... Me bad!.... Yes, what you describe is basically what I am going to build, except the bottle will be reversed.... Regulated at 2900 psi is the plan, which is the pressure I tether at as well....Sorry for the confusion.... Bob