I have had a FX Royale 400 regulated in 22 caliber for 4 years. In the past year I have noticed it has lost some velocity. Say average was 910fps now down to sometimes 885fps. All shot are still very consistent so I didn't think it is the regulator. I changed the breach o ring on suggestion of a member here and that changed velocity just a little to around 890fps. It seams maybe air is leaking around the o ring on each shot. I ordered some 009 Buna-N O rings of 90 durometer. They are pretty hard and a pain to install but it has helped my velocities to be back at 910fps average again for 50 shots. I will see how the long term effect is.
FX FX 400 Royale
- Thread starter SDellinger
- Start date
That's nice to hear
And yes, getting a 90 Duro into the barrel inlet must have been tough.
FWIW
The Royale 400 Parts Schematic that I got from the FX website specifies 70 DURO for that O-ring.
So if the 90 ever goes the 70 will be easier to install
That is what is in mine, and it is working properly
Just me thinkin' too much
Edward
And yes, getting a 90 Duro into the barrel inlet must have been tough.
FWIW
The Royale 400 Parts Schematic that I got from the FX website specifies 70 DURO for that O-ring.
So if the 90 ever goes the 70 will be easier to install
That is what is in mine, and it is working properly
Just me thinkin' too much
Edward
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The breech o ring was the only thing that was a problem when I had my Royale 400. Great rifle otherwise. I never tried the 90’s when I had it.
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When i changed that o ring, i would put in a felt pellet 1st ..then the o ring ..then a 2nd felt pellet.
Slowly push it down the barrel til the ring drops in
if you shoot out the felt..it's gonna be loud, so i use a wood dowel and push them out.
Slowly push it down the barrel til the ring drops in
if you shoot out the felt..it's gonna be loud, so i use a wood dowel and push them out.
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Maybe it's just me, but I don't follow this at all. Why mess with felt pellets when replacing a breech seal? Just put the new one in and shoot.
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I use a wooden dowel inserted into the barrel from the muzzle end &us it to position the 0-ring
It works well for me
You have made me curious however, and the next time I change one I'll give your method a try
Edward
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Please let us know how that works out
Especially regarding longevity, and effort/smoothness when pushing the pellet through the harder o-ring
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Whenever I eat Chinese food and get chopsticks, I keep the chopsticks for use while working on many things.
Since made of wood, they won't damage anything O-Ring or air gun related.
Replacing the breech O-Ring is simple;
1.) I push the O-Ring into the opening using the 'bent' O-RIng method. Meaning I squish it side x side and start it into the breech opening.
2.) II then, using the chopstick, push the O-Ring down into the groove on one side, getting it started.
3.) Then maneuver the O-Ring into position using the chopstick.
4.) Once the O-Ring appears to be in the groove all-around, I push the tapered chopstick through the O-Ring to assure that it's seated.
Done!
I use chopsticks for a lot of things. Mostly cleaning firearms and air rifles. They are easily shaped into any configuration needed by using a utility knife to carve whatever shape is needed and go to town. No worries with marring anything since they are wood.
mike
Since made of wood, they won't damage anything O-Ring or air gun related.
Replacing the breech O-Ring is simple;
1.) I push the O-Ring into the opening using the 'bent' O-RIng method. Meaning I squish it side x side and start it into the breech opening.
2.) II then, using the chopstick, push the O-Ring down into the groove on one side, getting it started.
3.) Then maneuver the O-Ring into position using the chopstick.
4.) Once the O-Ring appears to be in the groove all-around, I push the tapered chopstick through the O-Ring to assure that it's seated.
Done!
I use chopsticks for a lot of things. Mostly cleaning firearms and air rifles. They are easily shaped into any configuration needed by using a utility knife to carve whatever shape is needed and go to town. No worries with marring anything since they are wood.
mike
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Seams to work smoothly so far. I pushed a pellet through before I installed the o ring. I also let the pellet probe slide through. I'll keep you informed.
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Got it. Maybe I've been lucky, but after pinching the new O ring into the breech, using something not sharp, like a small allen wrench, the ring usually pops in place with a little fiddling.
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