Chinese Airgun Forum: Are these good numbers for a B21 .22?????

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Are these good numbers for a B21 .22????? May 9 2008 at 6:33 PM		(Login Voltar1) YFOT


Broke the seal on my B21 .22 and so made up a seal of Teflon with a good sliding fit. The previous owner had chopped the barrel to 10" length. Has a factory spring and a bit of a lube job. Shooting today over my chrony: 13.9 Chinese pellets go 740fps 14.5 grain JSBs go 708fps 21 grain Kodiaks go 570fps Does this sound reasonable? if not what should I expect to get to with a proper seal and spring from JM? am hankering to get the Apex seal and the spring for this gun. thanks in advance. Walter... BTW this is better than the gun was at 675fps with 14.3 grain Crosmans.

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Responses

That looks about right - Mike on May 9, 2008, 10:58 PM

Thank you Mike. was curious how it was doing. - Glover, Walter on May 9, 2008, 11:43 PM

Schematic - Frank on May 10, 2008, 3:30 PM

I think this should do ok.... - C. Lloyd Espiritu on May 10, 2008, 10:23 PM

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