7mm PRC?

[Yote Hunter]

Yes, I Id take this over a 284. I have some in F Open that are doing well. They will run where guys want the Shehane to run but the case shape is better and you wont hurt the primer pockets like you will in the 284 case. Its a far better design in my opinion.

Which case are you implying you would take over a 284? 7 SAUM or 7/6.5 PRC? 2950 FPS with 180’s?

 

[284winner]

I'd be running a SA with a wyatt extended box if that helps with COAL for the longer bullets.

How is it getting brass? Seems factory ammo isn't a thing for it really.

Brass is everywhere for the 284. Lapua started making it recently. I'd probably stay away from the Winchester 284 brass today. If you're going to run the 284 in a short action magazine fed platform, stick with the mags that do not have the binder plate in them. If not you'll only get 2.8 inch maximum OAL rounds

 

[Alex Wheeler]

Which case are you implying you would take over a 284? 7 SAUM or 7/6.5 PRC? 2950 FPS with 180’s?

 

[Darwin]

If you throat long enough to stay above the doughnut is neck turning necessary? I read somewhere here that neck up either causes or exaggerates inconsistencies. I haven’t turned necks, just making sure what I’d be getting into.

 

[LCazador]

Yes, I Id take this over a 284. I have some in F Open that are doing well. They will run where guys want the Shehane to run but the case shape is better and you wont hurt the primer pockets like you will in the 284 case. Its a far better design in my opinion.

Alex is this a standard 284 you're talking about or a 284 Shehane? I had that primer pocket problem with the standard 284 and max loads. The Shehane version shoots max loads without standing on the brass. I've always shot mine out of a long action. Agreed I like the PRC case design better!

 

[darkangel_r2]

Peterson brass lists the capacities of 284 win and 6.5 prc (7 prc would be a little higher than this number) as 65 and 68 grains respectively. Shehane is supposed to add 3.35 grains. The capacity of shehane and 7 prc would be basically identical. They would also have the same neck length.

If your mag is long enough to feed both (7 prc would be .130" shorter) The only difference between the two is bolt face. I would expect mag boltface brass to be able to handle higher pressures if the brass is made by the same manufacturer. So I would expect 7prc to get very slightly higher velocity before pressure and last a little longer at the same pressure.

7 prc with the 180 berger hyb would have an overall length near 3.04 with the bearing surface at the neck shoulder junction. Shehane would be at about 3.17.

I don't know the length of your box mag but if its shorter than 3.17" the 7 prc pulls ahead even more.

Honestly the performance between a shehane and a 7prc would be very small. I think the determining factor would be what is your gun's specs? If you have a 308 bolt face go with 284 family obviously. If you have a magnum bolt face go with 7 prc. If you have the ability to do either go with the one that best fits your magazine. If they both fit the mag flip a coin. If you have enough coins get both and tell us the difference in performance on target.

 

[Fish2keel]

Currently has a .308 bolt face but not opposed to opening up the bolt face, since 6.5 prc which was original intent of the built before I decided 7mm was a better bullet for my needs(hunting and target).

I have plenty of 6.5 prc brass, powder and primers on hand, which is why I thought about the necked up 7prc, although no direct dies or reamer exist. JGS does have a reamer available to custom order the a 7prc though.

 

[284winner]

Currently has a .308 bolt face but not opposed to opening up the bolt face, since 6.5 prc which was original intent of the built before I decided 7mm was a better bullet for my needs(hunting and target).

I have plenty of 6.5 prc brass, powder and primers on hand, which is why I thought about the necked up 7prc, although no direct dies or reamer exist. JGS does have a reamer available to custom order the a 7prc though.

If your looking for 7CM performance, you'll get better with the 284 in a short action. I'm not sure what kind of performance you'll get with the 6.5 PRC necked up but I'm assuming it would need a LA to get the most from it as the 284 does. Being there both about equal in performance, I cannot see opening up a bolt face to get into a magnum cartridge. Just my opinion. Not when what you have will work and give similar performance in a short action. 3000 fps is easily achievable with the 160-168 class bullets in a SA. If your looking for more performance, you'll either need a long action or a SAUM/WSM cartridge I'd think.

 

[Fish2keel]

SA is saying 2.850 coal right? If so, with the wyatt box the action would be more like 3.1. If that helps the .284 be able to run higher 170+ class bullets.

 

[284winner]

SA is saying 2.850 coal right? If so, with the wyatt box the action would be more like 3.1. If that helps the .284 be able to run higher 170+ class bullets.

My Rem 700 SA with accurate mags (no binder plate) will feed 2.980" cartridges. I run them at 2.975 the keep them smooth and no issues. That's no modification at all and with the 162 Amax bullets.

 

[Fish2keel]

I should have specified I was going to use a hinged floor plate instead of a mag, which is why I went with the wyatt extended box.

 

[284winner]

I should have specified I was going to use a hinged floor plate instead of a mag, which is why I went with the wyatt extended box.

Well I think if you have the Baney Box, it'll accommodate 3.1" OAL. That WILL require a gunsmith or DIY work to fit

 

[284winner]

I should have specified I was going to use a hinged floor plate instead of a mag, which is why I went with the wyatt extended box.

My next .260AI will have that Wyatt's Baney Box with factory BDL floor plate. Good set up

 

[B23]

Well I think if you have the Baney Box, it'll accommodate 3.1" OAL. That WILL require a gunsmith or DIY work to fit

Wyatt's has their 3.00 box which requires a little work and Kevin also has what everyone calls the "Baney Box" which allows 3.100 and requires a bit more machining and then if you want to go full Monty, Kevin now has his mid length kit that requires even more machine work but will turn a SA 700 in to a mid action and allow an OAL up to 3.235. I've talked to a couple different guys that went with Wyatt's mid length kit and they are very happy with that set up.

Short Action Mid Length Kit - Wyatt's Outdoor

This Mid Length PRC kit is designed to be used in a Remington short action. It will NOT work in most clones! Includes box, follower, spring, and bolt stop.

wyattsoutdoor.com

 

[Fish2keel]

I did go with the baney box, so I'll need to do some research on .284 coal for the higher weighted 7mm pills.

 

[B23]

With 180's and a OAL of 3.100 the 7-6.5PRC will have a small advantage in useable case capacity over the 284 with the same bullet at 3.100 resulting in around 50 +/- fps advantage for the 7-6.5PRC.

 

[Ackley Kid]

What velocities do you get between them?

I’ve been shooting the Shehane and 284 for years in F class . In 284 we are usually running 2720-2840 . Saum is considerably faster 2920-2980 but barrel life is also much shorter . Don’t have reamer here yet but have spoke with a couple fellows on your side of the border which say they are getting 2950 without pressure , with N160 I believe .

 

[284winner]

I did go with the baney box, so I'll need to do some research on .284 coal for the higher weighted 7mm pills.

You'll be happier with the 160 class bullet using the 3.1" box. You'd need the 3.2 for the 180 class for optimum performance and case capacity.

 

[Fish2keel]

I suppose I'll need to run the numbers on 160s vs 180s and the amount of energy down range compared to the 6.5 PRC(original intent)

 

[284winner]

I suppose I'll need to run the numbers on 160s vs 180s and the amount of energy down range compared to the 6.5 PRC(original intent)

Use honest/accurate numbers. For me anyway, the 162/168s outperformed the 180s due to lack of case capacity. You will have a longer OAL so maybe you will get lucky. Either way, you'll be able to run one or both bullets in that case with the 3.1" length.