Wow, $10.22 for 50 that is almost double what you can buy 50 Harvester Crushed rib for, $5.56:

https://www.midsouthshooterssupply.com/item.asp?sku=00072H15045BR

the Crushed Ribs work for me with .452 and .458 bullets, the grooves on the side allow easy sliding down the barrel. The base is STRONG on the Crushed rib. They seem to work well for me with most bullets, they do NOT work well with Parker Ballistic Extremes, cause they are .450, not .452 like most MLer bullets.
Chap