Yes. I haven’t heard of any current production hull not straight walled other than Remington and Winchester.
The hull might be straight walled, but the base wad insert makes that hull load like a tapered walled hull.Yes, There strait walled hulls.
Yes, Your going to need to use a Rio or a Nobel Sport primer. American sized primers will fall out of the primer pocket. Euro shells have a larger primer pocket than American made shells.
PS: I'm pretty sure Winchester HS hulls all have a strait wall now as well!!! break em all Jeff