Another SA 30 Cal build

[806 guns]

Hey guys im wantIng to build a 30 cal SA magnum. With lapua coming out with 300 WSM brass it seems like a no brainer. I am seeing threads with guys shooting the 210 bergers. I would like to stay in the 190-210 range for a SA Mag. Is the 300 wsm the better 30 cal SA mag cartridge? I see the 300 SAUM and 300 SS as well.

 

[sneedb82]

Following along with you my friend. I'm a huge fan of the WSM personally. Friends of mine that have shot long range longer than I have have the SAUM over the Win, but not the WSM. I think it would be personal preference for most. But I'm interested in the dialogue.

 

[HandgunHTR]

What about the 300SS? You may run out of mag length with the WSM using the heavy bullets, but you shouldn't with the SS.

This guy has brass and dies for sale: https://www.longrangehunting.com/threads/300-sherman-short-300ss-virgin-brass-and-dies.365566/

 

[skookum]

I had great results with the 200.20x Berger and the 195 TMK over about 71gr of H1000 going 2900 fps. I gave the 215s a try and they were too long for the magazine.
I rebuilt the rifle to a 7mm SAUM and my only regret was not doing a 7-300wsm, for a 30 cal I'd stay with the WSM case unless you like extra work forming brass.

 

[Rick Richard]

300 WSM and SA can be "iffy" when it comes to cartridge length. You can get away with some length issues by going to an extended box….but still might not accommodate some longer projectiles especially if you like shooting close to the lands. Keep in mind, I am discussing and referencing when using a magazine. Single feed is no problem. Also, center stag works better imo than staggered.

I have been there and done that and if I was to do then I would select at least a medium action, but would probably go LA. Just my thoughts. Good luck.

 

[806 guns]

300 WSM and SA can be "iffy" when it comes to cartridge length. You can get away with some length issues by going to an extended box….but still might not accommodate some longer projectiles especially if you like shooting close to the lands. Keep in mind, I am discussing and referencing when using a magazine. Single feed is no problem. Also, center stag works better imo than staggered.

I have been there and done that and if I was to do then I would select at least a medium action, but would probably go LA. Just my thoughts. Good luck.

I have a Kelblys sa mag face that I will be mag feeding

 

[lancetkenyon]

Personally, I wouldn't build a 300WSM on an SA.
I would go 300SS.
300SAUM would be the most I would go.

Here is a 300WSM w. 200.20x seated to .020" off the lands in a Tikka length LA mag (with the stupid spacer in the back to mimic a SA length) vs. an HCA 300WSM LA mag and bolt stop swap.

 

[PopNFresh]

regular sa or aics mags will roadblock anything heavy unless the bullet was designed around the mag length issue

 

[806 guns]

I have the 2.9 oal mags already for my SAW rifles.

 

[lancetkenyon]

I have the 2.9 oal mags already for my SAW rifles.

In my opinion, not long enough for a 300WSM w. Heavier bullets.
175 OTM or 185 Juggs, maybe. 200.20x-215, nope.

 

[806 guns]

Im thinking 190gr and under now. I shoot 175 in my 308 for deer.

 

[MagnumManiac]

I drank the Mountain Dew when the 270WSM came out in a Win Model 70, that action restricted COAL like I have never experienced, used it for a while as is, wasn't happy so I sold it.
Moving on, I built several WSM's, 25, 6.5 & 338 on both REM 700 SA/LA and standard Win Model 70 actions. The SA was also restrictive in COAL. The REM LA was a head scratcher, feed rails required widening, feed ramps altered and notching of the action, regardless of bolt altering were all needed.
The Win Model 70 required less 'work' to feed well and you could load any length bullet with ease.
I should've started with RUM sized actions in the first place, but they were difficult to obtain here with regularity.

Cheers.