Power po­si­tion

Air Gunner - - Your Letters -

I’m about to buy an FAC pre-charged ri­fle and I re­mem­ber read­ing an ar­ti­cle that you wrote some time ago in which you gave the ideal power set­tings. From mem­ory, it was 900 speed and 40 pounds, but I’m not sure. Can you tell me what it should be and why, please? By the way, the rea­son I can­not go back to the ar­ti­cle is that I give my back copies of Air Gun­ner to an old chap who lives near me be­cause even though he doesn’t shoot any more, he still en­joys read­ing all about it. It’s a won­der­ful mag­a­zine and I look for­ward to its ar­rival ev­ery month. JOHN

Hello John Thank you for the kind words; they mean a lot to us. My ‘magic on-ticket recipe’ is a 16 grain .22 Air Arms Di­ablo Field pel­let flying at 900fps which means just un­der 30 ft.lbs. muz­zle en­ergy. Over many years, I’ve ex­per­i­mented with ev­ery cal­i­bre I could find, from .177 to .30, at what­ever muz­zle en­ergy the man­u­fac­tur­ers could of­fer, even up to 100 ft.lbs.. I’ve never seen a pel­let fly faster than this and re­main ac­cu­rate. Many peo­ple have told me sto­ries about ri­fles that could ex­ceed this speed with to­tal pre­ci­sion but nobody has ever put one in my hands, so at the mo­ment I con­sider 900fps our up­per ve­loc­ity limit. You could choose to shoot the heavy .22 Bis­ley Mag­num at that speed and get around 40 ft.lbs., but I see no ad­van­tage. Any rab­bit, squir­rel or pi­geon get­ting in the way of 30 ft.lbs. will be very im­pressed and an­other 10 ft.lbs. won’t im­press it any more. Fur­ther, to at­tain that ex­tra en­ergy uses an ex­po­nen­tially in­creased amount of air from your reser­voir, which sig­nif­i­cantly re­duces the num­ber of shots per fill. Run­ning at this power, you also be­gin to no­tice the re­coil a lit­tle more and although it’s still very small, it does make the ri­fle marginally more dif­fi­cult to shoot ac­cu­rately. Lastly, I be­lieve that if you need more than 30 ft.lbs you should buy a .22 rim­fire. They’re cheap, light, con­ve­nient and de­liver around 100 ft.lbs. silently for no ef­fort at all. The ques­tion is do you need all that power? I don’t, and I’m per­fectly happy with my air­gun’s per­for­mance. Ed.

Af­ter much test­ing this is what I be­lieve to be the ul­ti­mate FAC set-up

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