Quote:
Originally Posted by CDN_Stalker
More to the point you should be asking "What benefits are 8mm bearing guides over regular 6mm metal bushings?".................... low fps and high rpm set up, sure, but aside from that they are largely useless and higher fps springs will wreck the bearing bushings. Add in bearing bushings aren't very friendly to some types of gear sets, if you have to force it on, expect to never get it back off, makes shimming a nightmare.
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I agree to the point that I've killed every set of 7mm bearings that have come my way, even the supposed best like the Kanzen... but they still take me 50,000+ rounds at 450 FPS/25 RPS to break. 8mm should be extremely robust just like how 7mm bearings are so much better than 6mm.
I just got my first 8mm G&P gearbox and it's running at 400 FPS at 30 RPS so we'll see how it goes. Unfortunately I don't play much in winter so I won't have any first hand usage experience for quite a while.
Common install problems with larger bushings is the grip hitting the bottom bearing (quick dremel/sand job on the inside of the grip fixes that), and the selector plate might need to be shaved so it doesn't get jammed on the bearing.