When you say 'burning through', do you mean like the one in the centre of the pic below? If so, that's not pressure burning through, it's what's called 'blanking' and usually results from an over-large firing pin tip allied to a poor fit in the bolt-face allied to a Small Rifle type primer (srp).
So, the second question is what action are you using? Some factory actions blank every srp primer going when you get much above starting load pressures. The one that produced this blanked primer is an FN SPR (Winchester Model 70 action) that had been rebarreled to 6.5X47 Lapua and did just this. It was promptly rechambered to 260 Rem whose Large Rifle (lrp) size primers solved the problem.
So why srp problems and not in lrp? I can't tell you why, but that's the way things pan out. There are three possible answers to your problem if it has bolt/firing pin causation: 1) use a harder primer with a thicker cup - but that's not much help here as the CCI-450 SRM primer has the heavier 0.025" cup and is about as tough a small primer as you'll get; 2) send your bolt off to Gre-Tan Engineering or one of the other gunsmiths who turn the pin down and fit a bushing with smaller diameter hole intro the bolt-face; 3) in your case as you're3 loading 6.5mm Creedmoor you have the choice of brass with both primer sizes. So put the Lapua srp stuff to one side and get Hornady, Starline, Norma, Peterson or whoever lrp cases.
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