Which recoil spring

First topic message reminder :

II have a Rock River Arms wadcutter with a bullseye rib and an Ultradot 25mm dot mounted on it. With Zero LSWC 200 and 185 gr, I am experiencing misfeeds. The are hanging up on the the feed ramp 2 or 3 times a box. Should I try a lighter or heavier recoil spring? It has about 1000 rounds through it.

What is a Colt dimple?

Blsi2600 wrote:What is a Colt dimple?

Colt magazine followers have small raised dimple in the middle.

After reading through all of this again, I'm gonna say angle of the follower on the magazines.  If the angle is to shallow the rounds tends to come in lower on the feed ramp and probably from your description that's what is happening.  I have to adjust almost every follower angle with the exception of the Wilson plastic followers.

mikemyers wrote:
So if the gun was perfect from the factory, and let's say we're almost doubling the mass of the slide+sight, it seems to me that the spring would need to be made stronger.  What am I missing?

To me it seems that if you are shooting low power bullseye loads and you mount a red dot to the top of the slide you would have to use a lighter recoil spring.