I traded for a savage action 300 rum from a member here. Got brass dies load data round count etc. I loaded Retumbo under a 208 amax with a cci mag primer starting at 85 gr ladder up to 95 gr in .2 gr increments. First round nothing just firing pin click, primer is dented as it should be. Try again rnd 2 same result. Came home pulled those bullets and I have half burned powder. Never seen this before. I pull them all down start over with wolf mag primers and same loads. (I loaded 338 Lapua rnds with this primer and this powder in similar charges at the same sitting and they are performing fine). Go to shoot the new loads today and nada. Just a dented primer. I tore the firing pin down and checked the spring tension, protrusion etc and seated a primer in an empty brass and boom just fine. Went to shoot again and nothing but a dent. I have not pulled these down yet. I have been reloading for 15 yrs or so and have been able to figure most stuff out. I am going to try some factory ammo next. No reason to doubt this rifle it has fired R22 with the cci primers here. I am using a lee shell holder in a rcbs chucker and not sure if possibly the primer is not seating deep enough but all I use is Lee shell holders and always have.

I've been through about 5,000 wolf small rifle magnum primers in 5.56. No issues. Many many others have had the same experience.