while searching for mounts, i came across a few companies that listed what type of steel they used (ie, 4140 steel). what does numerical value mean? the higher the number, the stronger the steel? aluminum alloys in comparison?
Here are some links that should help:
This last one shows the relative strength differences between 4140 and (Mil-Spec) 4150 steel:
Ammo FAQ: www.ammo-oracle.com
(Old) Mag FAQ: magfaq.tripod.com