Snap craps do not buy! - Vector Optics Snap Caps w/ Sling

I must have just bought these before the recent reviews, they've been sitting in my range bag for a while. These were a terrific price vs the a-caps that I normally buy for 223. However, these pieces of junk are not sized correctly. They do not extract & jammed every time. Initially I was loading two or three to a magazine, but got the toughest double feed I've ever had as my bolt carrier ripped into & got stuck in the side one of the snap caps trying to feed. After cutting my finger trying to pry lose the disfigured snap cap I had to use a screwdriver to hack & pry the snap cap clear...poor Betsy won't be able to have little ones now.
Then I tried using a single snap cap with different magazines. They all jammed or failed to extract. Stay away from these Chinese knockoffs.