Tamachi are absolute shit. They jam in AEGs, Systemas, pistols, sprinters, GBBRs, etc. I've seen few guns shoot them properly and many jam and chop repeatedly.
Bastard makes heavier BBs, but bios only go up to 0.28g. If you want heavier weight than that, order them from a quality company. Don't risk your gun with crap. If you need BBs right now, just grab a bag of high quality 0.28s like Bastards to get you through.
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