I tried it with LOS 123grs FP/8.4grs & 8.6grs RS 24 with OAL 29.3mm & 29.5mm.
Velocity didn't increase much, but my barrel is damaged now
It blow up a bit, somethere in the middle.
I have a second barrel, but wan't crack it, too.
Put a smaller version of the comp on it and use a lighter recoil spring.
This works fine with H&N CuHS 115grs/5.2grs RS 20/S&B SP/OAL 27,7mm.
Will test tommorow slower RS 24 7.6grs & 7.8grs /OAL 28.0mm & 28.4mm. PF will be around 130.