Hello everyone. . . . . I'm back from my little "Vacation" on my ole' BMW Scooter.
So, I see we have mention of the magazine springs for our R9 Series Pistols. Well, here is how things went at our shop:
Initially, the mag springs were ten coil jobs. They would begin to give us weak pressure against the rounds in the magazine within a relatively short time, depending on use. Karl went to a 13 coil spring and, while that worked, I felt it was too difficult to load the magazine and I also felt it was not necessary for it to be that stiff. I experimented by cutting one coil off of the 13 coil magazine spring and did a test fire of around 500 or so rounds, all of which were trouble free. I felt confident with this spring at 12 coils and it had the added benefit of being a little bit easier to load the ammunition into the magazine. As a number of you have correctly suggested, a weak mag spring will cause different malfunctions in a semi-automatic pistol. I feel if you are having any troubles with "stove-piping" and such, remove the base plate on your mag and count how many coils you have. If it's a 10 coil spring, then you have the 1st. Gen. spring and you should update that to the 12 coil spring. If you have a 13 coil, you have a 2nd. Gen. spring. Those work well, but are tougher to load. If you have a 12 coil spring, you have the 3rd. Gen. spring, which was to become the "Standard Magazine Spring" for the R9 Pistol. We had the least amount of jamming issues using the 3rd. Gen. 12 coil spring!
Below are the R9 magazine springs from Left to Right:
Gen. 1 ~ 10 coils
Gen. 2 ~ 13 coils
Gen. 3 ~ 12 coils