I have lately been using my HK416 in the shed with a Nerf digital target, which is pretty good fun actually.
My HK416 has a 7.5mm barrel, stock standard gearbox, using LDT milkies, 10m range to target.
No hopup being used.
So there are 7 target hits per round.
First the first 4 rounds, so 28 shots total, the blaster accuracy is pretty good, can get bulls eye shots fairly often.
But, for the 5th round and after, the accuracy turns to crap, the overall spread is twice as bad.
This same situation is 100% repeatable every time (I do total of 10 rounds per session).
Would love to hear from people as to what might be causing this to happen. Preferably would like to have all the rounds reasonably accurate, without it suddenly stuffing up after 28 shots or so. Cheers !