Jerry M
Well-Known Member
The only rifle I have ever had slam fire was my M1 Garand. It did it three different times with a triple fire once and doubled twice. I was using Fed 210M primers. Was approached by a long time M1 match shooter immediately when he heard my rifle triple fire that day. Without even knowing that I was using Federal primers he told me that you should not use Federal primers in M1s. I quit using Federal and never had it happen again. I have used Rem. WW, CCI, CCIBR and Wolf small rifle Mag primers in my AR 223 and all these brands with the Wolf LR in my M1 Garand without any problems.
You are describing 'doubling' or where the rifle fires more than one shot when you pull the trigger. Back in the day, it was not uncommon for this to happen with a High Power match tuned M14 or M1A as the trigger sears were honed so light. It is easily fixed most time with emery cloth.
Slam fire is commonly described when a high primer or other problem causes the cartridge to fire before the bolt is fully forward in battery. Usually the receiver blows up. Parts flying everywhere.
These are very different terms.
Good luck
Jerry