Best speed for 30 JSB?
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Topic: Best speed for 30 JSB? (Read 740 times))
Gippeto
Sharp Shooter
Posts: 864
Best speed for 30 JSB?
«
on:
February 09, 2017, 10:20:30 PM »
Got my .30 running today and a start on tuning. Currently 895-912-903 for 8 shots on 3000psi fill. Lots of room to play in any direction, but wondering if there's a "best" speed to run the JSB's at for accuracy.
TIA
Al
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Alberta, Canada
rsterne
Member 2000+fps Club
Bob and Lloyd
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Posts: 26958
GTA Forums Person of the Year 2017
Real Name: Bob
Re: Best speed for 30 JSB?
«
Reply #1 on:
February 09, 2017, 10:38:04 PM »
Ask Tim@ Mac1.... He won the EBR with them a couple years ago in a TJ's liner.... I'm pretty sure he was running the 45 gr. at about 880.... I've run them as fast as 960ish, but never played with velocity to see if they shot better slower.... It is always possible that you could tune them for other velocities with an Air Stripper or Adjustable Tuning Weight, also.... If you have a tune you particularly like, I think I'd try tuning the harmonics....
Bob
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Coalmont, BC, Canada
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Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since! 🇺🇦
Airsenal:
1750 CO2 Carbine, .177 Uber-Pumper, .22 Uber-Carbine, .25 Discovery, 2260 PCP 8-shot Carbine, 2260 HPA (37 FPE), 2560 HPA (52 FPE), XS-60c HPA in .30 cal (90 FPE), .22 cal QB79 HPA, Disco Doubles in .22, .25 & .30 cal, "Hayabusa" Custom PCP Project (Mk.I is .22 & .25 cal regulated; Mk.II is .224, .257, 7mm, .308 & .357; Mk.III is .410 shotgun and .458 cal), .257 "Monocoque" Benchrest PCP, .172/6mm Regulated PCP and .224/.257 Unregulated, Three regulated BRods in .25 cal (70 FPE), .30 cal (100 FPE) & .35 cal (145 FPE), .257 Condor (180 FPE).
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Best speed for 30 JSB?