Berget Forum

The maxiumim bullet weight for class 1 - 4 is 0,30 g
The maxiumim bullet weight for class 5 - 8 is 0,43 g

Unless it's an extremely light rubber head, I think those things are a no-go.

I would strongly recommend trying to source the midcaps because getting those 500 rnd hicaps to feed with a smaller amount can be a pain(Hi caps generally do not feed the last 20 or so bullets because the feed pipe functions differently to a mid or realcap) and the rattle that they make when only filled to about a fifth of their capacity will also get old pretty fast.

Also the amount of suspicious looks and thoughts you'll get from other players when they see you winding your highcap ... better not do that

if it is a magazine which carries more than 90 bbs then you have to tape it with blue tape saying RAL, but you cannot load more than 90 bbs

They seem to be in stock in a Norwegian shop called Wasteland, if Norway's acceptable. Mayhaps a bit more expensive, but the possibility is there

http://www.wasteland.no