Hi guys, has anybody tried the maccari`s apex large seal and the tesla large
seal on the same gun(rws34 .22 mine is) and see any improvement that justefies
buying the more expensive one over the other .TIA. Walter.

The Tesla seals are hard and the parachute groove is shallow. Everyone I tried had to be sized to fit.
The Apex seals are softer and the parachute groove is deeper. They are more "forgiving" and work better in scratched and out of tolerance compression tubes.
If your compression tubes are not perfectly round and straight or if you can't size your piston seals, try the Apex seals. I like 'em.
Rob