I was able to goto the indoor range tonight and do a few more tests. Overall it was a better result than the first go with the Battledyne mags. Still needs work though.
I can't do rapid fire at the indoor, so each shot had about a 3 second pause between. I had previously put 25rnds in each mag and left them in for 48hrs to try and weaken the spring. I also got some FrogLube and took a q-tip and coated the inside where bullets are fed and the follower. Tried out CCI Minimag, CCI AR Tactical bulk, CCI Blazer bulk and Remington Thunderbolt. Minimags ran great, but after I loaded more than 10 rounds I would get high feed jams. CCI AR Tactical jammed twice out of 10 rounds, these rounds are a bit waxy on the tips. CCI Blazer jammed every second shot, these things have bits of wax all over them... I don't think I'll try these anymore. Remington Thunderbolts were the best of the bunch (feeding wise), I was able to load 15 and not have a single issue. I didn't try anything higher than 15 rounds yet (on any ammo).
From what I've experienced today, and after comparing both my mags to my factory ruger 10rnd - it seems the spring is too strong, and the followers angle might be too steep. Here is a comparison photo, I scaled each mag to be approximately all the same size. All the mags are loaded with their max capacity, using remington thunderbolts.
Notice how much more steep of an angle the battledyne's are at? One BD mag more so than the other. (Red line showing the max bullet height angle, blue line showing where the factory ruger 10rnd bullet sits).
Battledyne mag1 close up /
Battledyne mag 2 close up /
Ruger 10rnd close up
I'm going to load the BD mags up again with 25rnds and leave them for a few more days to try and weaken the spring a bit. If bullets still sit at a high angle, maybe one of these mods might help?
#1 - What are peoples thoughts on clipping a sprial or two from the battledyne mag spring? I think the strong spring is creating too much tension after approx. 10 rounds loaded in, and causing feeding issues, possible also the reason bullets are getting crunched on the side by the bolt.
#2 - The other option is maybe sanding down the angle of the feeding ramp orange plastic piece?
Thoughts?