Hi Gents

Please can I pick your brains regarding this phenomenon. I have just bought a 1995 HW99 from a dealer who I asked to check the output (it had been 'tuned')which was 673 fps with hobbys = 11.99 ft lbs. It has since started dieseling a lot, after 150 shots it stopped, then after another 50 started again. Now it's had 250 through no smoke but the shooter next to me said he could smell it still was. It cocks & shoots smoothly & accurately so hopefully won't need anything too drastic doing.

Any similar experiences would be helpful, thanks Andy.