I have a R1 chambered in 308. bought it used and the seller told me it had about 40 rounds thru it-- i kind of believe it based on the condition and that was why he said he was selling it-- never used it.--plus he had my money when he told me that so why lie.
Anyway put about 100 rounds through it over 3-4 trips to the range and found the "locking head retaining pin" had broken upon cleaning it. (I do clean it every time I shot it). Anyway ordered another and installed-- on a hunting trip i found it had broken also !!! I estimate again about 150 rounds. I've ordered another AND a spare but changing this out every 100-200 rounds in crazy! Anyone else having this trouble? Solutions??
oh only shooting factory ammo-- NUMEROUS types as I was trying to find what it liked the most.
for those more technically inclined, the break looks like a low cycle fatigue failure-- inception-- growth--- sudden failure area.
thanks for your help-- Joel A.