Chinese Airgun Forum: QB78 .20 help please

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QB78 .20 help please June 30 2008 at 3:49 PM		dee (Login ecophon) YF


Hi Have a qb78, tuned every which way you can, but I seem to have hit a stumbling block... Put in one of rich from mich's .20 walther barrels, and I knew the power would drop as previously it was a .22 but I now struggle to get 10ftlbs or 630 fps with H&N Field & Target Trophy .20 (11.4gr) when previously I had to be careful to keep it under the uk 12ftlb limit. Have I limited the power to this by using a 15" barrel or am I missing something else? Very many thanks

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Responses

QB78 Barrel Length - Stephen Archer on Jun 30, 2008, 5:10 PM

Re: QB78 barrel Length - Jay J on Jun 30, 2008, 10:36 PM

QB Deluxe Barrels - Anthony on Jul 1, 2008, 5:54 PM

RE Qb Deluxe barrels - Jay J on Jul 2, 2008, 11:28 PM

my QB 14" carbine shooting 600 and just under - buster on Jun 30, 2008, 7:43 PM

For what it's worth... - robert on Jun 30, 2008, 8:10 PM

Rich in Mich .20 QB 78...pics... - John Ulrich on Jun 30, 2008, 8:12 PM

QB is .20 - Rich. from Mich. on Jun 30, 2008, 10:35 PM

mods done are... - dee on Jul 1, 2008, 5:30 AM

Probe length and od - dee on Jul 1, 2008, 10:14 AM

probe length........ - Mike melick on Jul 1, 2008, 6:27 PM

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