Diana 52

[DSidelever]

make their own barrels.

I believe they favour 8 or 12 land rifling (flat topped, of course). 12 land is what I see on my rifles.

Regarding barrel outer dimensions - they have little importance to either a PCP or a non-breakbarrel springer for, I hope, obvious reasons.

Air Arms used 12mm OD barrels on their AA300 series of PCP's, FX / ABwhatever used similar barrels on the FX2000 and Excalibre rilfes, again PCP's but the principle remains.


No doubt someone will start up on "Barrel Harmonics" shortly

(ignore them, they are ridiculous).

[Captain Bongo]

I sleeved and fitted an LGV piston to my 52 for benchrest.
It's quite nice but the project stalled once I got my TX200SR.

A good solid platform and capable of fantastic consistency/accuracy.

[Barryg]

make their own barrels.

I believe they favour 8 or 12 land rifling (flat topped, of course). 12 land is what I see on my rifles.

Hi DSidelever, can you tell me what models you have that have 12 land barrels?
This is the reason I ask
http://www.network54.com/Forum/184474/thread/1364692329

[DSidelever]

I must be wrong on the lands number Barry, I certainly don't have one the brief period China made barrel rilfes (it was limited to a few models in their range).

[Shed tuner]

I changed one of my TXs to use a magnetic underlever catch - no pressure on the barrel. Didn't see any change in accuracy. Artful-bodger made a no-pressure catch for his 77 too, but I don't recall the effect.

See the thread I started discussing this:
http://www.airgunbbs.com/showthread....ght=underlever

ProSport might be the better platform. But rebarreled with a longer barrel / sleeve.

[NickG]

I changed one of my TXs to use a magnetic underlever catch - no pressure on the barrel. Didn't see any change in accuracy. Artful-bodger made a no-pressure catch for his 77 too, but I don't recall the effect.

See the thread I started discussing this:
http://www.airgunbbs.com/showthread....ght=underlever

ProSport might be the better platform. But rebarreled with a longer barrel / sleeve.

Looks like I will stick with the TX as my target gun then , John from reading your post it looks like you put the magnet at the end of the underlever , so still in contact , I had wondered about using a magnet right up near the pivot underneath the breech, not sure if there would be enough umph to hold it , Neil Birkin has a paul short shroud on his lgu that utilises two magnets again up near the end.

[Shed tuner]

Looks like I will stick with the TX as my target gun then , John from reading your post it looks like you put the magnet at the end of the underlever , so still in contact , I had wondered about using a magnet right up near the pivot underneath the breech, not sure if there would be enough umph to hold it , Neil Birkin has a paul short shroud on his lgu that utilises two magnets again up near the end.

yeah, near the muzzle. for sure it still contacts, but it can't push fore and aft, which would deflect the muzzle.. it can only have the gravitational pull due to the weight of the lever itself. That's the theory, but I think I may be trying to fix a problem that doesn't exist

[maximus]

I have an 80's 52 bought second hand off here. It's heavily modified running a huge piston extension to shorten the stroke to about 70mm. This gun made power so easily it was untrue, super efficient set-up IMHO. The other striking thing was how good the barrel is, tolerant of a wide variety of ammo and grouping superbly with the best of the bunch. My 77 can't match the groups but I don't rate the barrel on my example.