Registered User
Advice needed please.
I have a BSA Mercury Challenger & a Mercury S
The Mercury S is like new and probably not been fired in over 30 years.
Both are in .22" and look like they share the same breech seal.
My question is what is the best seal to use from the following:
1, Standard BSA
2, T.R.Robb heavy duty
3, Weihrauch (I'm sure I read somwhere that these can be used & that Venom used to use them but not sure)
4, any other recommended?
Your thoughts please..
Thank you,
Pete.
Last edited by kennp; 16-11-2014 at 07:09 PM.
Where's his User name?
I recently bought a test length of nitrile hose and made a new breech seal for my mercury. Works a treat! Only cost a quid off yhe bay and 8ve enough left for another dozen maybe!
Donald
Muddled
Personally, I would stick with the BSA original. They only coat a few ponds and will last you years. Saying that - Ive got a BSA breech seal in a Venomized HW80.
Ive also replaced the poxy leather breech seals in some of my BSF with one and a half 'O' rings' A half because it has a sloping face.
HTH
Ian
Founder & ex secretary of Rivington Riflemen.
www.rivington-riflemen.uk
Registered User
On my meteor, the HW (77) seal gives a clear power advantage over the BSA.
HTH - JB
Administrator
I find the Weihrauch breach seal gives a better seal than the grooved BSA seal.
In the early editions of Airgun Shooter where Steve Pope wrote the workshop section he found that the Weihrauch seal gave 1/2 ftlb more power than the BSA seal.
All the best Mick
Muddled
Originally Posted by T 20
I find the Weihrauch breach seal gives a better seal than the grooved BSA seal.
In the early editions of Airgun Shooter where Steve Pope wrote the workshop section he found that the Weihrauch seal gave 1/2 ftlb more power than the BSA seal.
All the best Mick
Why has the standard BSA seal got a nick/groove in it?
The HW77 breech seal has a grooves all the way round its circumference. I use a '80/35/85/95 ...... non grooved seal and have had no problems.
ATB
Ian
Last edited by I. J.; 16-11-2014 at 10:50 PM.
Founder & ex secretary of Rivington Riflemen.
www.rivington-riflemen.uk
Even better looking than a HW35
As already said above, I have HW seals on my Merc and challenger, seem to seal a lot better and all the BSA seals I've had to dig out after they've gone brown, hard and crumbly.
Pete
Far too many rifles to list now, all mainly British but the odd pesky foreigner has snuck in
Administrator
I've no idea why BSA put the groove in Ian --- it could be something to do with how they're formed.That explains why there is a BSA breech seal in my Venon HW.
Why has the standard BSA seal got a nick/groove in it?
The HW77 breech seal has a grooves all the way round its circumference. I use a '80/35/85/95 ...... non grooved seal and have had no problems.
ATB
Ian
The 77/97 seal has the groove round the middle so that it can deform when compressed, the break barrel seal doesn't need this groove.
I find the break barrel seal works well in 77s and 97s if there is a bit of play in the cocking linkage and makes up for the wear.
All the best Mick
Registered User
There is a cut out so that when closing the barrel it doesnt catch on the transfer port and cut the seal. I had this ans had to dress the sharp edge to stop the seal being nicked.
Why has the standard BSA seal got a nick/groove in it?
The HW77 breech seal has a grooves all the way round its circumference. I use a '80/35/85/95 ...... non grooved seal and have had no problems.
ATB
Ian
Posting Permissions
Reply With Quote
