want to take it to 1300yds. What's some real life ballistics on these calibers. It'll be my first 7mm. Always been a 6.5mm guy. Pros and cons of both. Fireforming isn't really a con to me. Aleast not enough to play in the descision. Twist rate recommended on both too also..

Long or short action? Hunting style or dedicated heavy rig?

Flip a coin, both work great.

1 in 9 twist with a 162 A-Max will get you around 1500 yds with a muzzle velocity of 3000 fps.

Shod

heavy rig used out of box stand for whitetail.

Summitsitter, Nosler makes 280 ai brass so you don't have to fireform. Will you be having a rifle built by a Smith or do you intend on buying off the shelf, Kimber, Nosler custom, etc. Do you have an existing action etc.

Shod

I plan on building it myself. Gonna use a LA 700 either way. Will have to open BF and maybe feed rails for wsm but will be able to seat the long bullets way out.

You'll be able to get some great velocity out of the 7WSM if you throat a chamber long with that LA mag. The new 195gr Berger EOL bullet is coming out soon, and that would be an absolute missile from the 7WSM at 2900+fps, with a predicted G1 BC of 0.794

Can't go wrong either way, but if you're pushing it to 1300+ yards, I'd probably neck down Norma .300WSM brass to 7WSM and go.

Jordo-you reckon would need to run a 30 or a 40" tube to safely get 2900 with a 195 out of a WSM case...

Dober

LA Rem 700? I know what I'd use....

Yup.. you are gonna need a 30" tube.

Yep, I'd be all over the 7 Remmy, slam dunk.

Personally i would build the 280 Ack over the 7mm WSM, with that said save yourself some trouble and get a 7mm Remington Magnum it will out do both.

Me 2, and I know that Tanner's dreaming about the same thing.

Dober

Oh shoot, I know what you old boys are thinking...

Bea and Tanner are closing in on it......

Dober,

It's purely speculation, but I see guys getting 3050fps out of the 180gr Berger, so I figure 2900fps should be doable with a 195gr bullet of similar design and bearing surface. Once the bullet hits the market, I guess we'll see what's actually achievable, and with different barrel lengths. Or somebody could just run it through QL

For a purely LR rifle, designed to shoot out to 1500+ yards, a 30" barrel wouldn't be the end of the world. But you're not gonna want to do much still hunting with it!

I just had a novel idea- you could always just run a 7mm Mashburn Super Mag and drive those 195gr Berger bullets at 3000fps for a true LR hammer.

I know I'm thinking outside the box here, compared to the rest of the guys on this thread, but give it a thunk and thank me later...

Heehee! Jordan got it.

284 Shehane with 180g Berger Hunting VLDs at 2950fps from a 28-30" 1-9 twisted barrel.

What is a 284 Shehane?

.284 Win with 0.010" less body taper, and about 3.5gr more powder capacity.

Oh...

Thanks Jordan!

It is my aim to please

Done right a .284 win ( or Shehane ) is pretty groovy...

Jordan, which powder(s) are you or others using to get those speeds with the WSM?

I could be wrong seven_miller but I believe they're using a new prototype powder called H75KPSI that just came out this year......

Dober

Thinking lots of those guys use H4831sc and various Vihtavouri powders, and probably some Norma stuff too.

Or what my man Dober said...

IMR7828ssc, Norma MRP, R25, N570

Scroll down:

http://www.6mmbr.com/7mm284.html

Haha! Wouldn't it be interesting if we all had our loads pressure tested...

And thanks guys, I was just curious.

C'Mon Man! H75KPSI isn't a new powder, it's the same ol' powder the 7mm "Mashed-Taters" crowd has been using for decades. We all know that H75KPSI goes best with only certain favored 7mm cartridges and purple kool-aid..... gosh, the rest of us would be a fool to use it in anything else...

Thats kinda harsh.

More like +85KPSI, most guys were running them pretty hard to get 2950 with the 180's in the 7WSM, a 195 is alot of bullet in that short fat case and I think a better bullet for the longer cases, but what a LR missle it would be!

I'd love to see some calculations from QL, if anybody is willing...

Any news on the 7/375 Ruger? Seems a good fit here also...

W

QL shows the following with a 180 Berger and 26" barrels to make 2950

58593psi for the 7 Rem Mag
70697psi for the 7 WSM

The 195 is going to take a large case for sure to make it work well.

Just curious- what were the input details on the two loads? The 7WSM is within 0.5gr in case capacity of the 7RM, so assuming equal input variables, pressures should be a lot closer than that, I would think.

Since you're hunting, I'm sure you expect an impact velocity to open up the bullet. Don't you?

I don't think the 284 S or 280 Ackley will do that at 1,300 yds.

Well, you have to figure even if just intuitively, that 2950 is about what you get with a 180 gr 30 caliber bullet in the 300 WSM;a 7mm bullet weighing 15 gr more with less base for the gas to push on,(and likely more bearing surface because it's longer)is going to be harder to get to the same velocity in a case of the same capacity...and only one thing will do it....more pressure.

I could be all wet here, but in a case with the capacity of the 7 Rem mag and 7mm WSM, I'd be happier with something like a 162 Amax myself.You'll start it faster for sure, and the 195 might catch up, but at what distance I don't know..

Numbers anyone?.......anyone?

Just for you, Bob

Comparing the drop and energy...

And BTW, this isn't shown on the graphs, but the 195 catches up to the 162 in velocity at 875 yards, at 2063fps.