View Single Post
 
Old 07-04-2018, 04:29 PM
WR Moore WR Moore is offline
Member
 
Join Date: Oct 2006
Posts: 6,581
Likes: 1,788
Liked 5,342 Times in 2,685 Posts
Default

A lot of the feed ramps in early semi-autos were designed for FMJRN. When hollowpoints that sorta kinda worked in revolvers were designed, there was an attempt to just transfer that design to semi-auto ammunition.

Sometimes that worked, sometimes it didn't. Some of the ammo companies tried to mimic a bullet profile similar to RN. The Remington 115 gr JHP (now the HTP version) in 9mm and the slightly later Federal bullet used in the 9BP load are examples. Federals first effort was a truncated cone and it wasn't entirely trouble free in feeding.

Took awhile for many of the gun companies to get on board and revise their feed ramps. S&W was way ahead of Colt on this, having done so (IIRC) in the 39-2.
Reply With Quote