chas, as Randy replied. Some fire one to ensure that first shot out of barrel is on target. I do not fire a squib but for me...I take a wet rubbin alcohol patch or 2 then several dry to completely clean ALL oil from barrel before carrying gun on hunt. With my 10 ML & White Super 91 my first shot is on if I do this.
In both guns i fire a 209 or #11 cap(GUN UNLOADED) to ensure breech plug is clear of all oil etc. I also as a back-up shine a lite in breech & make sure i can see though. Just some things I do. You will get many individual pointers here. Thats whut make this MLin so darn much fun! :lol: