Yes, industral production of polygon barrels is generally cheaper than traditional land & groove profile.
Anyway, just received a mail from L. Walther and they suggest using traditional barrels for "target shoting"....
So, ....I have to keep my 25 cal HW 900 as it is (2" @ 30 yds) till Ben Taylor wonder barrels will be available....
Roberto
www.airguns.it
Hey Roberto, would not blame the barrel for those groups. Can be difficult to shoot a gas ram accurately - even though 2" at 30 sounds terrible.
Scope OK? Maybe it's moving about inside.
Also removing the barrel may be less than easy, although having taken a look at your site, it seems that you know your stuff quite well.
**WANTED**: WEBLEY PATRIOT MUZZLE END; Any Diana/Original mod.50 parts, especially OPEN SIGHTS
Belive me, I tried everything possible to make this rifle shooting better...but no way. For this reason I'm thinking to swap the barrel, it's a sort of last chance.
Probably part of the problem is the pellet choice; in this caliber the market is quite poor, only the Diana dome 19.75 give acceptable groups. Other brands/models are simply useless.
Anyway .25 barrels on springers/gas ram are particularly pellet-fussy, especiallly if you go up with the power (I own also a terrible W&S Patriot same caliber).
On pcp irguns things goes different, I shooted a Rapid 12/250 @ 50FP and it makes beautifull groups with 30 grains Baracuda (up to 100 yds or so...).
Roberto
www.airguns.it
Is yr HW90 FAC or 12Ftp?
In FACtrim they usually shoot terrible unless you let off some pressure!
They're over pressurized from factory!
They should shoot well with either baracuda or FTT.
If you stíll wish to change the barrel, buy another HW one. About 72 euro's in germany..
ATB,
yana
My take on this, Roberto, is that the barrel has nothing to do with it.
A smoothbore barrel can get better groups than that.
The gun's recoil on the other hand probably has a lot to do with it. As hytyger is suggesting, try de-tuning a bit.
If the velocity drops too much because it's a .25, you may consider buying a used, complete with breechblock, HW barrel off here, in .22. Not sure whether it would have to be a 90 barrel or if other HW break barrel guns barrels c/w breechblock will fit - you'll have to find that out for yourself.
Personally except in PCPs at 40-50 ft/lbs+, I am not a fan of the .25 - too much commitment needed!!
One other thing to check - the lockup of the barrel. *Possibly* the recoil may be causing the barrel to "open" which of course would be no good. However I would expect vertical groups in such case.
**WANTED**: WEBLEY PATRIOT MUZZLE END; Any Diana/Original mod.50 parts, especially OPEN SIGHTS