Planet Airgun

General Airgun Categories => Ammo, Accessories and Equipment => Topic started by: Mark on June 09, 2020, 05:29:06 PM

Title: Pellet Size
Post by: Mark on June 09, 2020, 05:29:06 PM
 Hello again after a long absence  on this forum, and thanks for the recent birthday message, as I find myself on Furlough, I have found myself doing a bit of target practice in the garden with what pellets I have available, the pellets I am using were sold to me in an unmarked Tin, so no idea what they are, but they seem to group fairly well, at 15 Metres, ( The length of my garden ), I am using a Theoben Fenman .22, its a tricky Airgun, but is accurate depending how its held, I also have a tin of H & N sport Field target Trophy ( I cannot remember buying them ) I tried these but they take a lot of pressure to push into the breech, so I stopped using them, they are 5,5 mm, and on the barrel of my Theoben it is stamped 5.5 mm, my question is what diameter pellet should be used in a 5.5 mm barrel, and can anyone tell me the best pellets to use on the Theoben, Many thanks in advance.
Title: Re: Pellet Size
Post by: Gambo on June 09, 2020, 08:22:17 PM
If I remember correctly, the Fenman has a German Anschutz barrel.

If you're finding your current H&N FT Trophy a tight fit, I'd suggest giving Crosman Accupel/Premier a try.....or trying to find some FT Trophy in a smaller head diameter than you have now (usually printed on a label on the underside of the tin).

If yours are saying for example 5.53, then try some 5.50 or even 5.49 or 5.48.

Another good option is RWS I've yet to find a non-PCP rifle they do not shot well out of.

Hope that helps Mark. ;)

Title: Re: Pellet Size
Post by: Mark on June 09, 2020, 08:56:03 PM
Okay thanks for that Gambo, my current H & N FTT are size 5.5 mm
Title: Re: Pellet Size
Post by: sme4969 on June 10, 2020, 01:35:57 AM
Okay thanks for that Gambo, my current H & N FTT are size 5.5 mm
mark on the back of the tin it will say 5.50 5.51 etc etc

As for pellets it is the same as any gun. find a pellet yours likes and buy as many tins as poss in the batch number
Title: Re: Pellet Size
Post by: Mark on July 06, 2020, 10:03:16 PM
Just thought I would give you a quick update , I decided to try .22 RWS superdome pellets going by Gambos recommendation and at 15 metres got 10 shots within a pound coin group, and at 25 metres slightly larger than a pound coin, but not by much, I was going to post some pics on here but am struggling, I also changed the breech seal as the old one had a slight nic in it, and also managed to destroy my old scope probably by over tightening it !!, so with a new budget Hawke scope which is in fact very good, and better mounts to deal with the recoil, the old Theoben is doing okay, forgot to mention that it has a very short 7 inch barrel, not sure how much this affects accuracy, if anyone knows of any air gun clubs or ranges near Brecon in Wales, I would be interested to know, so I can give it a more thorough test of distance and try out different pellets.
Thanks from Mark
Title: Re: Pellet Size
Post by: Gambo on July 07, 2020, 08:18:47 PM
Great to hear you've found Superdomes work well in your rifle Mark.

A short barrel is actually an advantage on a rifle where accuracy is concerned. The theory is that as the pellet spends less time in the barrel, there is less chance of the shot being pulled off target by poor trigger or follow through technique, as it's already gone and left the barrel.

As an aside, very short barrels can sometimes cause problems regarding power though, as in some instances not enough (full) pressure is allowed to build-up behind the pellet before it exits the muzzle. Having a longer barrels allows all that pressure to be utilised though. This is more related to PCP's than gas or spring powered piston rifles however.

Have a check on Google for clubs near Brecon.......there's a Clubfinder (on the NRA site) which may be able to offer you some pointers. I know there are ranges in Tirabad/Sennybridge which isn't too far from you, but not sure if they accommodate airguns. Worth asking though!

Hope that helps.