Just got a factory 10 rd mag for my SGL-41 .410 and seems a bit off. When I depress the mag at the front (see pic) it won't budge but if I push from mid or back of loader it goes down fine. Have not tried this with ammo yet or fired with mag but I found the problem when I inserted the empty mag to ck fit and I could not pull the bolt back. So cked my 4 Rd mag and bolt pulls fine with an empty mag and the mag depresses anywhere you push down. Seems he bolt wont budge because it is snagging on the front of the mag where it won't depress...Is this common for the 10 rd mag to not depress at th