Loaded Magazine Confusion

[razmtaz]

Okay, now I'm confused. On these two points I've read many convincing arguments that: 1) 30-round mags are meant to hold 30 rounds and there's no need to under fill them to insure proper function, and: 2) The springs wear out faster by repeated emptying and filling of the mag, as opposed to leaving them loaded. I've lately been reading the US Marine Corps Rifle Marksmanship manual and the following are excerpts pertaining to these two points: 1) "The recommended number of rounds per magazine is no more than 29. Thirty rounds in the magazine can prohibit the magazine from seating properly on a closed bolt." 2) "Ammunition in filled magazines should be rotated frequently if the rounds are not expended. The spring tension on the magazine can weaken if compressed for a long period of time and can cause a malfunction of the magazine." Hard to imagine the Marines have it all wrong...

[markm]

Is this really a fitness and nutrition topic?

[Eurodriver]

Hard to imagine the Marines have it all wrong...

LOL you met many Marines?

[Alpha-17]

Hard to imagine the Marines have it all wrong...

The military frequently get a lot wrong.

[ST911]

Is this really a fitness and nutrition topic?

Perhaps if you have trouble seating a magazine under a closed bolt. (I kid, I kid...)

Thread moved. Please keep it civil and help OP out.

[markm]

Or Fit'niss ammo into my mag.

Yeah. Just load 28 or 30 and live well. I'm in the 28 round camp.

[Diamondback]

Current science has it that it's not time in compression that kills springs, but operating cycles. Look at how long a 1911's mainspring and recoil spring stay under almost permanent compression--their replacement schedule is round-count not "time under load."

[Uncas47]

The mags I love above all others hold 20 and that's what they get, the 30s get 28. No worries, just pick a side and dig in.

[docsherm]

LOL you met many Marines?

I have.......... And it is NOT hard to imagine.......

[1168]

The spring wearing out “problem” is simply bunk. I’ve used mags that I loaded in the previous deployment, on my next deployment. As to trouble seating a full mag on a closed bolt, the Gen 3 PMag was purposely designed to almost hold an extra round for that purpose. USMC issues them….