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Magazines for sgc speedmaster
Posted: Sat Mar 19, 2022 1:29 pm
by shoppe
Hi
My southern gun company speed master rifle ( 223) is away to get a new barrel fitted.
I am planning using heavier bullets 77graim mk.
Just having a quick look at my magazines ( pmag x30) and if looks like they should be able to get in the magazine.
My question is, is there other makes of magazines that have slightly more internal room to allow the COL to be that wee bit longer?
I have a few metal magazines but they are old and do not run as smoothly.
Cheers
Shoppe
Re: Magazines for sgc speedmaster
Posted: Sat Mar 19, 2022 11:37 pm
by Sim G
The 77gn SMK is a overall length tolerant bullet so load it to 2.260 as per data. This is the standard length and will run in AR magazines. Anything longer won't work in the mag. Stepping up to 80 grainers and you'll have to increase the OAL length to 2.550" and singularly load them.
Re: Magazines for sgc speedmaster
Posted: Sun Mar 20, 2022 5:37 am
by shoppe
My first look yesterday suggested the oal would be about 2.250. I will make up some dummy rounds today at 2.260 and see how they fit.
Thanks
Re: Magazines for sgc speedmaster
Posted: Sun Mar 20, 2022 8:44 am
by channel12
I would suggest using 75g PPU, almost identical ballistic performance but about half the price.
Re: Magazines for sgc speedmaster
Posted: Sun Mar 20, 2022 1:54 pm
by shoppe
Cheers for the heads up.
I will certainly try them
Re: Magazines for sgc speedmaster
Posted: Thu Mar 24, 2022 11:42 am
by shoppe
500 ppu 75 grain bullets arrived today from kranks. Looking good.
Just need the rifle now
Re: Magazines for sgc speedmaster
Posted: Thu Mar 24, 2022 3:53 pm
by Blackstuff
Just make sure you get the standard 77grs and not the tipped version, which don't fit! (I Had some sent to me because of a warehouse error)
Re: Magazines for sgc speedmaster
Posted: Thu Mar 24, 2022 5:02 pm
by shoppe
Aye, its the standard type.
Thanks
Re: Magazines for sgc speedmaster
Posted: Thu Mar 24, 2022 9:05 pm
by channel12
Blackstuff wrote: ↑Thu Mar 24, 2022 3:53 pm
Just make sure you get the standard 77grs and not the tipped version, which don't fit! (I Had some sent to me because of a warehouse error)
Reading is essential. He said he has bought 75gr PPU bullets not 77gr Sierra match kings.
Re: Magazines for sgc speedmaster
Posted: Fri Mar 25, 2022 1:42 pm
by Blackstuff
channel12 wrote: ↑Thu Mar 24, 2022 9:05 pm
Blackstuff wrote: ↑Thu Mar 24, 2022 3:53 pm
Just make sure you get the standard 77grs and not the tipped version, which don't fit! (I Had some sent to me because of a warehouse error)
Reading is essential. He said he has bought 75gr PPU bullets not 77gr Sierra match kings.
Calm down dear and read the original post.
