These snap caps feel very high quality. Miroku makes Browning shotguns now so it seemed like a perfect match for my O/U. The extra primer replacements are a nice bonus, though I don't see them wearing out anytime soon. The spring tension is adequately firm. For the price compared to other offerings these boast a tremendous value. Only time will tell.
These are perfect for practicing working the bolt and for dry fire trigger control practice. Also great for releasing the firing pin for long term storage. I’ve not had one issue with these being too large or too small for the breech.