docux,.... I believe ther might be quite a difference 'tween a "coned" muzzle, and TC's "QLA". I'm jest not exactly sure what the "QLA" is (or even if thet's how you spell it).
However, a "coned" muzzle has a gradual 1 1/2 inch "taper" run'n from, "almost" no groove to full-height rifle'ns (depend'n on depth of rifle'ns).
The purpose of a "cone" is to allow the ball to be gently swaged to bore diameter, with as liddle distortion to the pure-lead roundball as possible.
This long cone gives the ball room to slowly and gently conform to the bore. Thus completely eleminate'n the need for a short-starter, as the ball can be easyly started with "thumb pressure".
Does the TC/QLA have a "step" in it's transition from no rifle'ns to rifle'ns?? :?: