Other than the 'factory ammo' as I rarely shoot factory except for Commi x39 and rimfire . That something you should do anyway is to cancel out all the variables. I always try back-up my warranty complaints with fact.
for IRay, only thing I had, After 1 year my iRay dual-Battery Charger was doing some malfunctioning on one side. did the on-line warranty thing and got an email couple days later. had a new Charger about a week after that in my Mail.
.