new luger owner

[glenadkins]

Hello all....I am new to the scene and after 35 years of wanting one, have finally purchased my first Luger. It is an all matched 1916 Erfurt, no orig. mag, bore is excellent. I will post pictures soon but first have what I believe is a common problem and question. The gun would stovepipe with the mag that came with the gun. I bought an original WWII Mauser manufacture mag and with Fiocchi 124 gr. rounds the gun fired error free. I then bought a box of Winchester 124's and I couldn't get it to fire more than 2 rounds without a problem. I know the usual problem is the mag and or a combination of mag and ammo. Since this mag has worked perfectly before, any suggestions on ammo? Can 145 gr. be fired in the gun or is this too much round for the gun?....Thanks.......Glen