I've got like four 'chargers' to my name and can only find two. I just went out and tried loading techniques(just charger loading practice not shooting)....did try swapping the No.5 and No.4 mag box around.
Discovered that Rem/UMC 174gr ball will NOT self rectify itself with a whack on the bolt handle as in the video. Simply pushing down on the cartridge stack does nothing to cure rim-loc in my rifles with Rem ammo.
I think my RFI No.4 rifle's mag is well used and fresh painted! It's spring is noticeably weaker than the mag that came with my No.5 BSA.
Loading the cartridges wrong ///// will load the Jungle carbine(with own mag)...but not worth a hoot in the No.4 with it's own mag.
Going to try swapping the mags and try the ///// rim stagger thing on the No.4 with No.5 mag next. The spring/follower assembly may need replaced in the No.4 magazine.
Actually I may drag my No.1 Mk.III out and see of I can discover why it works fine compared to it's sisters!
Awsome advice so far Thanx