Barrel Replacement

[Higgleplog]

Hopefully ive found KevG. Hi i have a .22 early MK1 1258. Im inquiring as to what options are avaliable to change to .177. Ive seen blanks from various companies, also read previous posts about machineing required to convert as well as pellet probe etc.Interested in your regulator if one exsists for my gun.
Its a 12ftlb gun with the bean can moderator.Im competant to strip and rebuild as i have revalved twice. ive had the gun about 32ish years.Open to suggestions as you have probably done dozens,and i only want to do this once. Thank you.

[Mickyd]

Put a wanted add up for a .177 barrel,you might get lucky.md

[KevG]

silco do the barrel blanks
kevG

[angrybear]

Used barrels do come up for sale but can sell for utterly insane prices, as you have a working rifle trying to do a swap (barrel, mag & probe) on whatever sites you're on, might be worth trying.

[Higgleplog]

Thank you for your replys. so is changing barrels/calibers not something required by owners? i didnt realise. I wouldnt consider exchange as i wish to keep all the original .22 parts. Last winter i made a stock from a Ergo grip and Magpul stock,just to see if the ergonomics worked. its fustrating to have ideas and not be able to action them because of cost or lack of skill/facility. ill keep looking see what come up,thanks again.

[Ca_Varminter]

Yes, you can change calibers, just as long as you have the Proper Parts....
Our Dr Bob can supply your the Inner Probe, Outer Probe, and Mag..
If you get a blank from Silco.. KevG or Dr Bob's machinist can machine it up...
Or if you get a Rapid Barrel...will help the project along a bit(No Machining)

Good Luck,
Stuart

[Higgleplog]

Hello again.
 Checked out the Silco site, they do Weihrauch barrels, i assume that a 16mm is required @ 495mm long. do i get choked or unchoked? i know what a choke is because i have shotguns, but dont know enough about air rifle ballistics to know which is required. Also whats the approx cost of all engineering including screw cutting for a moderator? i see the barrel isnt blued,is there a service for that, or do people fit shrouds now? If this is feasible im serious about going ahead with this.

[Higgleplog]

Check that, there site says out of stock, will phone tomorrow.

[Squinty]

An option consider- if you can get hold of one.
HW100 factory barrel- full length 600mm,£132
 screwcut and blued, needs shortening to required length and porting.
o/d is variable  15.90-16mm- as the HW100 breech is reduced bore centre v o/d may need checking, possibly sleeving.
I have one on my S-type-alike, great with JSB 10.3, Barracuda- superfields

[Higgleplog]

Theres a company called TWC who sell Lother Walther barrels in .177
the options are: 16mm x 615mm 1 in 17.7 twist. 16mm x 615mm no choke 1 in 17.7twist. 16mm x 605mm polygon rifling 1 in 17.7 twist. which if any would be suitable? Thanks again.

[Squinty]

Choked polygon would be the preference of many, if the machining is done right there's little between poly and 12 groove until you start counting points around the X-ring.

Choked! the three unchoked .22 blanks I've had made up (2x12groove 1xpoly) have been 100% fussier unlike older barrels that have improved with the chokes relieved or cut off.
You can work with a choke.

IMO LW blanks are now over priced particularly as you're going to cut 40-60 quids worth off for a sub-12 barrel (16-19")
Add on £60-70 for machining + blacking, postage to and fro. £300+?

[Higgleplog]

Had a look for the HW100 barrel in .177 and its out of stock at the same company. ill keep looking

[Squinty]

potentially HW100 tuning?
Might even machine it for you, he does a bit of rapid work too.
If not go may have to go for the silco or LW

[Higgleplog]

I have checked today, and Silco have the .177 16mm 495mm choked barrel in stock. unless advised otherwise, im going to order one on Monday.

[Higgleplog]

Thats the Weihrauch barrel i was refering to.