A brief comment on 700 bolt handles. Had one come off during safety testing after lightening trigger pull. Yes, I give it a hard test including a workover with my rubber hammer simulating a hard fall with the bolt handle landing on a rock. On examination the braze didn't fuse with the bolt, I'd guess around 20% fused properly. Could be not enough heat though I'd guess contamination. No industrial process is perfect. Properly done you'd have trouble getting one off with a big steel hammer.

Anyway, had the owner call Remington who sent a prepaid box along with profuse apologies and repaired it quickly.

The key elements in human thinking are not numbers but labels of fuzzy sets. -- L. Zadeh

Which explains a lot.