I just use a new fx pump now
If you come to Basildon at all (a fair way from Witham but perhaps on your travels??) Thameside Fire Protection in Cranes Farm Road will fill a 12l 300 bar bottle while you wait. I think last time it cost me £5.
Whether you think you can or think you can't, you're probably right.
I just use a new fx pump now
Last year 7L 300 bar test and fill £32 plus any serviceable parts; £40 total. The fill was only 270 bar which I was not happy about, but it seems that others on this thread have paid extra for a fill after test. That 250 bar fill you had is very poor.
That £64 they charged you for test was expensive (presumably to cover cost of them sending to a test centre). Unlikely to fail, but if it did, that's more money gone. You need a more cost effective fill/test centre next time. Expensive test but preferable to a new cylinder with airgun valve which now seem to be priced around £214; and they know it
Treat Others As You Would Wish To Be Treated.
7 ltr 300 bar and 9 ltr 300 bar 5yr test and filled £76,11 mile away
BSA m/s ultra 177 huma reg,Gamo Coyote .177, BSA international MK2 22lr, BSA Sportsman HV .22 FAC huma reg 25ft/lb. Webley Raider 10, .22,Marlin 795 22lr,brno CZ452 22lr
They state 300 bar filling and are RFD and sales/shop.