7SAUM vs. 284 Shehane | SA vs LA

[bsumoba]

Off to my next project...a lightweight, tactical rifle that will serve for:
* Hunting
* ELR
* Tactical

I have a 284 Shehane (a wildcat of the 284 Win, with 0.010" blown out cases for a little more boiler room and higher velocities) and for some reason, the 7 SAUM is just calling out to me. However, I constantly get put down by the fact that the 7 SAUM ballistically is not that much different than the 284 Shehane variant. Its probably 50-150 fps faster than the 284 Shehane, which to me, is not worth it since I will need to have new dies, expensive brass, barrel life will be an issue if I shoot a lot and everything else that goes along with building out another rifle in another caliber.

Am I missing something as far as its advantages over say the 284 Shehane for my intended purposes?

The next step would be choosing a SA or a LA. I know a SA could handle a 284 Shehane, but thinking that a LA is probably better for more versatility since I have a SA already. Is a LA the way to go? Going to primarily use 180 gr hybrids

I plan on doing a Proof barrel WITH a brake, Deviant Hunter action, and CF stock.

[ElvenSoul]

Just regular .284 is kicking hiney these days. No need to WildCat.

[toby]

Why the SAUM over the WSM?

[RobG]

Either way, LA is the only way to go. The 284 in a SA hinders ultimate performance. A LA can load as long as you can.

[ar15barrels]

Why the SAUM over the WSM?

The shorter case fits in a short action easier without having to seat bullets so deep that the ogive is dropping inside the case mouth.

[toby]

The shorter case fits in a short action easier without having to seat bullets so deep that the ogive is dropping inside the case mouth.

Well then hell go long action and do a 7-300 Weatherby.

[Cypriss32]

I shot a few rounds of 7mm....... 7wsm was such a accurate round. It was super easy to load for.

What really sucks is the costs of it now. Its over .50 a bullet for 180gr stuff, plus impossible to find brass. Also if you are shooting a SAUM or WSM from a hunting weight rifle (thats going to be light) its going to kick your butt badly. My 7wsm with no brake at 14 pounds was NOT fun to shoot.

I can just see it this rifle for sale in a little while to fund something you can use more often, but I might be wrong. If you want a 7mm hunting rifle how about a TC Venture 280 for $441.00 at buds?

[dskit]

Either way, LA is the only way to go. The 284 in a SA hinders ultimate performance. A LA can load as long as you can.

Don't tell that to Sanders...

[bridgeport]

Ha, ha, You are of course missing the essential factor, that being the 7rsaum looks so darn cool with that 180 hybrid poking out.

[bsumoba]

Ha, ha, You are of course missing the essential factor, that being the 7rsaum looks so darn cool with that 180 hybrid poking out.

but the 180s poke out of a 284 case just as nice

[LynnJr]

Load a round with the boattail to bearing surface junction 0.050 in front of the neck/shoulder junction and cycle it quickly and slowly to see how it functions in your action.
Now seat one 0.100 in front of the neck/shoulder junction and if it will cycle your current action will work just fine.
If your throating a chamber with the boattail/bearing surface junction more than 0.100 in front of the neck/shoulder junction you are typically asking more from your combination than it can produce.
Throating extra long in the hope of reaching another velocity node seldom works. You pick up extra velocity but seem to fall short of the next node almost every time in my experience.

[bsumoba]

Load a round with the boattail to bearing surface junction 0.050 in front of the neck/shoulder junction and cycle it quickly and slowly to see how it functions in your action.
Now seat one 0.100 in front of the neck/shoulder junction and if it will cycle your current action will work just fine.
If your throating a chamber with the boattail/bearing surface junction more than 0.100 in front of the neck/shoulder junction you are typically asking more from your combination than it can produce.
Throating extra long in the hope of reaching another velocity node seldom works. You pick up extra velocity but seem to fall short of the next node almost every time in my experience.

Good advice Lynn.

Mine is chambered with a freebore on the short side, but was spec'd out by Kiff @ PT&G for the 180 hybrids. I think its a .188 freebore. I see a lot of posts with guys running 180 hybrids in a 284 Win / 284 Shehane chambering and they're running in the .200"-.225" range.

I'll know tonight what my freebore truly is since I'm getting it back from Alex @ Masterclass today. Im hoping I dont need to get a uni-throater since I do want to load my bullets with the bearing surface above the "donut" region. I rather not ream out the donuts out From my research, jumping the hybrids seems to be the ticket with 284 Shehane in the 0.010"-0.030" region.

[Bhobbs]

Isn't Berger working on a 195 grain hybrid for the 7mm? I would keep that in mind if I was building a long range 7mm.

[bsumoba]

Isn't Berger working on a 195 grain hybrid for the 7mm? I would keep that in mind if I was building a long range 7mm.

put on hold from my research to keep up with demand for the 180 hybrids and vld's as well as their other lines like the 6mm and 6.5mm and 308s

[Switchbarrel]

Isn't Berger working on a 195 grain hybrid for the 7mm? I would keep that in mind if I was building a long range 7mm.

put on hold from my research to keep up with demand for the 180 hybrids and vld's as well as their other lines like the 6mm and 6.5mm and 308s

It's my understanding Bob Cauterucio has a 189 gr. 7mm.

-Rick