Long Action AICS Magazines

TrueBlue711 · July 18, 2019, 08:09 AM

Looking to upgrade my 300 WinMag Rem 700's stock to a tactical stock/chassis that accepts magazines. I heard that I need to be careful when it comes to choosing magazines. i.e. I can't simply just buy "long action" and expect it work fine with 300 WinMag ammo. Can anybody shed more light on this? Any suggestions for AICS style magazines that work fine for 300 WinMag? I don't reload and only use factory ammo (typically Hornady or Federal) if that helps.

**Unclenick** · July 19, 2019, 02:33 PM

300 WinMag has a wider head than the descendants of the 30-03 that are associated with long actions. You want to be sure the stock is inletted wide enough in the magazine well area to accept the magazine for your cartridge.

Your best bet is always the horse's mouth. Ask the stock makers their stock fits a Rem 700 in 300 WM.

PlatinumCore16 · July 19, 2019, 04:24 PM

You should be fine with factory ammunition in most all long action AICS mags for 300WM. Unless you're getting really long bullets (a la high BC) ammunition, which is available, but not as prolific as your 180, 190, 200 gr bullets.. Just look at the specs of the magazine from the manufacturer you are buying from and compare it to your typical ammunition COAL. The real bear comes from reloading your own and messing with lead-in. If you're trying to seat your bullets in the rifling, that's where you can run into trouble with the magazines. If you are getting quality magazines, not knock offs, you should not have any trouble.

TrueBlue711 · July 22, 2019, 07:21 AM

Quote:

Your best bet is always the horse's mouth. Ask the stock makers their stock fits a Rem 700 in 300 WM.

Agreed, this will be the plan.

I see Magpul made a magnum AICS magazine that will fit 300 WM. I just hope it'll fit in the stock(s) I want to upgrade to (of course, I'll be asking them prior to purchasing).

July 18, 2019, 08:09 AM	#1
TrueBlue711 Senior Member Join Date: March 16, 2011 Posts: 489	Long Action AICS Magazines Looking to upgrade my 300 WinMag Rem 700's stock to a tactical stock/chassis that accepts magazines. I heard that I need to be careful when it comes to choosing magazines. i.e. I can't simply just buy "long action" and expect it work fine with 300 WinMag ammo. Can anybody shed more light on this? Any suggestions for AICS style magazines that work fine for 300 WinMag? I don't reload and only use factory ammo (typically Hornady or Federal) if that helps.

July 19, 2019, 02:33 PM	#2
Unclenick Staff Join Date: March 4, 2005 Location: Ohio Posts: 21,063	300 WinMag has a wider head than the descendants of the 30-03 that are associated with long actions. You want to be sure the stock is inletted wide enough in the magazine well area to accept the magazine for your cartridge. Your best bet is always the horse's mouth. Ask the stock makers their stock fits a Rem 700 in 300 WM. __________________ Gunsite Orange Hat Family Member CMP Certified GSM Master Instructor NRA Certified Rifle Instructor NRA Benefactor Member and Golden Eagle

July 19, 2019, 04:24 PM	#3
PlatinumCore16 Senior Member Join Date: February 23, 2017 Location: Colorado Posts: 424	You should be fine with factory ammunition in most all long action AICS mags for 300WM. Unless you're getting really long bullets (a la high BC) ammunition, which is available, but not as prolific as your 180, 190, 200 gr bullets.. Just look at the specs of the magazine from the manufacturer you are buying from and compare it to your typical ammunition COAL. The real bear comes from reloading your own and messing with lead-in. If you're trying to seat your bullets in the rifling, that's where you can run into trouble with the magazines. If you are getting quality magazines, not knock offs, you should not have any trouble.