AR Buffer Spring question

[mif_slim]

So, I made some light loads for my .223 DPMS to shoot. The loads are 6.2gr of AA#5. It worked the best with no signs of pressure. 7.1gr shows signs of pressure so Im sticking with 6.2gr. Reason for is because I stoped loading for handguns and I have a ton of #5 sitting around.
Anyways, with that amount of powder its enough to push the bolt back just for the case to get stuck on the ramp and not enough to eject the round.

I was thinking, can I get a softer spring to shoot these light loads? The only problem I can think of is that the bolt might not close all the way. Has anyone tried this? Im sure its fine, My XD and my Sig has diffrent spring rates for diffrent loads, just that their handguns.

Anyone ever tried this?

[Army]

Use a carbine buffer.

[mif_slim]

would that be softer or shorter?

[maxicon]

It's primarily a lighter weight buffer, though there are fewer coils on the spring as well.

Here's a recent discussion on buffers and their effects on cycling:

http://www.calguns.net/calgunforum/showthread.php?t=159123

[Army]

No, just the buffer. No need to change the spring.

The buffer will still do its job, but because it is lighter, will allow the lighter load to function the action.

BIG CAUTION!! Never fire standard loads or ammo in a short buffer rifle! The carrier will retract into the buffer tube, possibly catching on and trashing the buffer detent.