Yeah I had no issue with mine either trip to Bisley. They work a lot better now.
I'm happy to hear that. In 99 I had a bit of an issue with a C79 in Bisley.
I went with 1R22eR and used one of thier rifles (coach "insisted" instead of using my own... I think they were something besides rack guns... and they sure grouped like something besides rack guns)
Anyway - I was recovering from a bad car accident and I had several broken ribs - so I coughed a lot and running was a challenge. I was shooting well, but not exactly white-hot, but I figured I was doing pretty alright considering my condition... Then sometime in the second week I noticed that the two sides of my windage screw were floating in a couple different directions. In all the ARA matches I wasn't adjusting the scope for wind at all, and it went unnoticed after the initial zeroing day.
So, in the shacks that night I tore it all apart and tidied up the base with teflon tape, loc-tite and a hammer.

Rolled it up to where the 200m zero should have been and went into the matches the next morning.
After one sighter I was back in the game. I won the day's 1st match (Bisley Bullet) with a killer (IMO)50.5 at 200 on a fig14 and figured that life was good.
I had a bit of a road ahead to make up for the points that I hadn't been getting in the previous week, but not impossible.
The next match was 300m snap, just like CFSAC. And in that match I generally expect to see a 50.5 or better, so I was looking forward to THAT. My sighters were overlapping pinwheels, so I figured I was back in the game.
I fired a 25.5
The damn bolt broke after the first 5 shots. Two locking lugs and about 1/4 of the bolt face and the extractor came off. Luckily I was with the VanDoos and I know how to swear in BOTH official languages.
Anyway - it's tough to make up 25 points in the Grand Agg at Bisley. I stayed in the top 50, but that's about all.
Who knows how many rounds that bolt had fired in it's life... I'm pretty sure that the Army never tracked bolt life -- how could they because bolts were never married up to specific rifles and nobody kept logs. For all I know, that bolt had been in service since the first C7 hit the ground in Valcartier in (1986?)...
Anyway - the bolt, and the C79 ar both evidence that technology exists always in one of only two states. FAILED and ABOUT TO FAIL.
And the crap that the British Army calls food shuld be the subject of a separate thread. Seriously - I bought my own orange juice and milk every day to ward off scurvy and osteoperosis.