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Posted: 12/27/2018 12:02:38 PM EDT
[Last Edit: 1/14/2019 10:47:43 PM EDT by MDWS]
Link Posted: 12/27/2018 12:20:12 PM EDT
OST!
Link Posted: 12/27/2018 12:24:09 PM EDT
Link Posted: 12/27/2018 12:26:54 PM EDT
Old school tag. Sends automatic updates to threads.
Link Posted: 12/27/2018 12:32:45 PM EDT
Link Posted: 12/27/2018 12:33:35 PM EDT
[Last Edit: 12/27/2018 12:34:51 PM EDT by jblomenberg16]
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Originally Posted By MDWS:

That's the 2nd time I've seen that "OST", what does it mean? Thanks!
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Ha ha, sorry! OST = Old School Tag. It used to be that to subscribe to a thread on a message forum you had to actually post in the thread. It got to be a habit to then just type "Tag" to have a post so that it was in your subscribed threads folder. Of course now you can subscribe without posting, but what fun is that!

Anyway, sorry to take your thread off topic, but I am genuinely interested in the GPC family that you are working up.

Would love to see comparisons with some of the other new rounds coming out or that have been out for a while.

Like .224V, .277 Wolverine, 6.5 Grendel, and 300BLK. Just my guess but I'd imagine that the 22GPC would be pretty competitive with .224V, and the 26/27GPC would be pretty competitive with the 6.5Grendel as well.
Link Posted: 12/27/2018 12:40:31 PM EDT
Link Posted: 12/27/2018 12:56:00 PM EDT
25GPC looks like it could make a nasty (beautiful) easy shooting deer round, like a short action 25-06
Link Posted: 12/27/2018 3:14:45 PM EDT
Link Posted: 12/28/2018 10:13:41 AM EDT
Link Posted: 12/28/2018 8:34:51 PM EDT
I've wanted something quarterbore ever since my grandpa kept expounding on the virtues of the .257 Roberts, which he converted an Arisaka into with a re-barrel and sporterized it.

One of my Sniper partners used an AI .25-06 when we placed 2nd at FinnSniper in 2008, shooting Berger VLDs.

That gun didn't move, even with his hot loads.

I'm not interested in .25-06 though because long action, bolt gun, non-starter for me.

It would be fun in the AR15, but COL is limited with most cases except the Grendel, and since there weren't that many target bullets in .257", Bill Alexander chose .264"/6.5mm for the vast projectile selection ranging from varmint, medium game, to target.

Things are starting to change in the quarterbore's projectile selection. Hornady's 110gr ELD-X (.465 G1) and Blackjack's 131gr ACE (.330 G7) open up some doors for .257 that haven't been in-play.

The 131gr ACE was envisioned being shot from 25x47 Lapua and 25 Creedmoor PRS rifles, and it is a long bullet, longer than any of my 139-142gr 6.5mm VLD/Secant ogive target bullets. OAL is 1.438", BC is confirmed at 1000yds at 2930fps using 1:7 or 1:7.25" twists, not theoretical or geometrically compared to existing form factors.

Imagine staying within the AR15 frame size, but with a COL that allowed you to load that bullet, and neck tension/length that would keep it aligned well during feeding.

Link Posted: 12/28/2018 11:07:31 PM EDT
[Last Edit: 12/28/2018 11:10:48 PM EDT by 44-40pro]
Traded email with the guys at MDWS, and came to a decision.
Have been toying with the idea of doing a barrel swap on one of my 5.56 ARs into a 7.62x39. After looking at the data for the 30PRC, tossing a 125 grain bullet at around 2600fps in an 18 inch barrel, I think I have changed my mind. Being able to use a 6.8 bolt, mags and barrel as opposed to a x39 bolt, modified firing pin, and relatively few mag choices the x39 seems to require to run reliably, seems an easy choice to make.

Will be waiting/looking to build a 30PRC as soon as parts become available. What say the arfcom folks? Anyone else interested?

ETA: NO interest whatsoever in the 300BO, and the 30 PRC is about 300fps faster, on paper at least.
Link Posted: 12/28/2018 11:12:20 PM EDT
Link Posted: 12/29/2018 12:05:58 AM EDT
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Originally Posted By 44-40pro:
Traded email with the guys at MDWS, and came to a decision.
Have been toying with the idea of doing a barrel swap on one of my 5.56 ARs into a 7.62x39. After looking at the data for the 30PRC, tossing a 125 grain bullet at around 2600fps in an 18 inch barrel, I think I have changed my mind. Being able to use a 6.8 bolt, mags and barrel as opposed to a x39 bolt, modified firing pin, and relatively few mag choices the x39 seems to require to run reliably, seems an easy choice to make.

Will be waiting/looking to build a 30PRC as soon as parts become available. What say the arfcom folks? Anyone else interested?

ETA: NO interest whatsoever in the 300BO, and the 30 PRC is about 300fps faster, on paper at least.
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I'm a 300BLK fan and love the ability to run super or sub in the same gun, with the same case, and same gas system. But to do that the 300BLK is a compromise on both ends of the spectrum. There are limited subsonic expanding bullets (but the list is growing) so while you can sling a 220gr projectile down range similar in weight and velocity to a 45 ACP, you don't get 45ACP bullet performance. The supers are pretty good for short range hunting with 125's going up to around 2100-2200fps depending on barrel length, but that means about 150 yards as max effective range for most medium sized game.

All that said, I'm really thinking hard about the 30GPC because of that added velocity, which means longer range capability and better short range terminal performance, so may wait for that option vs. jumping onto the 6.5G bandwagon.
Link Posted: 12/29/2018 12:09:59 AM EDT
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Originally Posted By MDWS:

We appreciate it but typo it's 30 GPC, the PRC is a Hornady cartridge. The 30 GPC should be around come end of summer or so. The 20 and 24 are coming out next then 25, 26, 30, 22... somewhere in that order.

Thanks!
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OOPS!!! Sorry about the typo. GPC GPC GPC, got it
Link Posted: 12/29/2018 12:16:07 AM EDT
[Last Edit: 12/29/2018 12:18:04 AM EDT by 44-40pro]
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Originally Posted By jblomenberg16:

I'm a 300BLK fan and love the ability to run super or sub in the same gun, with the same case, and same gas system. But to do that the 300BLK is a compromise on both ends of the spectrum. There are limited subsonic expanding bullets (but the list is growing) so while you can sling a 220gr projectile down range similar in weight and velocity to a 45 ACP, you don't get 45ACP bullet performance. The supers are pretty good for short range hunting with 125's going up to around 2100-2200fps depending on barrel length, but that means about 150 yards as max effective range for most medium sized game.

All that said, I'm really thinking hard about the 30GPC because of that added velocity, which means longer range capability and better short range terminal performance, so may wait for that option vs. jumping onto the 6.5G bandwagon.
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I agree with you except for the fact that personally I have no interest in subsonic rifles. Really tried to get on the BO train, just never could muster the good feelings for it. Same for the 6.5G.

The 30GPC on the other hand really piques my interest so I will be waiting for the barrels and hopefully dies etc will be following along real soon. Will also be interested in seeing what the round will do with 150gr bullets.

Come on MDWS, get these guys out on the market ASAP!!
Link Posted: 12/29/2018 11:19:38 AM EDT
Link Posted: 12/29/2018 11:21:02 AM EDT
Interested to see 27 GP data to compare to my 6.8 data. Would be nice to see 18" data.
Link Posted: 12/29/2018 1:26:45 PM EDT
Link Posted: 12/29/2018 1:46:27 PM EDT
Link Posted: 12/29/2018 2:07:46 PM EDT
How does the 24 GPC compare to the Tac 6?
Link Posted: 12/29/2018 2:10:24 PM EDT
Link Posted: 12/29/2018 2:16:22 PM EDT
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Originally Posted By MDWS:
It's marginal in 16" and under I would say. You start to see the real difference at 18" and longer as you are better able to take advantage of the additional case volume.

What bullet are you looking for data on? I'll see if we have it. With the 27 GPC you can basically take SPCII data and work up, and, the GPC was designed to load long so while at the same time you are increasing case volume our freebore is set a bit long as well to keep pressures in check as you move the bullet further out. Therefore the 27 GPC will prefer some of the slower powders in the 6.8SPC range/window.

I know it sounds too simple, but basically start with SPCII loads and work up... there is a ton of SPCII data already out there to use as a baseline.
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Originally Posted By MDWS:
Originally Posted By Falcon09:
Interested to see 27 GP data to compare to my 6.8 data. Would be nice to see 18" data.
It's marginal in 16" and under I would say. You start to see the real difference at 18" and longer as you are better able to take advantage of the additional case volume.

What bullet are you looking for data on? I'll see if we have it. With the 27 GPC you can basically take SPCII data and work up, and, the GPC was designed to load long so while at the same time you are increasing case volume our freebore is set a bit long as well to keep pressures in check as you move the bullet further out. Therefore the 27 GPC will prefer some of the slower powders in the 6.8SPC range/window.

I know it sounds too simple, but basically start with SPCII loads and work up... there is a ton of SPCII data already out there to use as a baseline.
I reload 6.8 with 95gr. TTSX and 120gr. SST
Link Posted: 12/29/2018 3:03:48 PM EDT
[Last Edit: 12/29/2018 3:08:12 PM EDT by MDWS]
Link Posted: 12/29/2018 6:27:48 PM EDT
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Originally Posted By 44-40pro:

I agree with you except for the fact that personally I have no interest in subsonic rifles. Really tried to get on the BO train, just never could muster the good feelings for it. Same for the 6.5G.

The 30GPC on the other hand really piques my interest so I will be waiting for the barrels and hopefully dies etc will be following along real soon. Will also be interested in seeing what the round will do with 150gr bullets.

Come on MDWS, get these guys out on the market ASAP!!
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You can google the 30 HRT and American 30 to get an idea on ballistics. Pretty much the same thing.
Link Posted: 12/29/2018 6:32:16 PM EDT
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Originally Posted By 1776-1865_RIP:
How does the 24 GPC compare to the Tac 6?
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Assuming the 24 GPC maintains the standard 6.8 trim length, the TAC 6 will have a theoretical advantage with heavier bullets since it is shorter allowing the ogive to stay out of the case mouth on VLD types.

You can look at the 6x6.8 to get some rough ballistic info.

Nevertheless, being a MDWS fan, I look forward to having this family of cartridges come to market. My 358 Yetis and 6mm Mongoose barrels have proven to be very accurate.
Link Posted: 12/29/2018 6:44:14 PM EDT
Link Posted: 12/29/2018 6:44:54 PM EDT
[Last Edit: 12/29/2018 6:48:10 PM EDT by MDWS]
Link Posted: 12/29/2018 8:43:32 PM EDT
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Originally Posted By MDWS:

We dont have a ton of data on either of those yet, sorry. If you want to send me your load data for them in your SPC maybe we can replicate them as a starting point and see how we do? We did some work with the 120SST with CFE223 behind it but we did not focus on it much at all to give a fair result. As an example we were able to push the 130 grain Federal Fusion pulls 100fps faster than the 120SST using pretty much the same data so as you can see I cant offer much for that one yet.
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Will do. Would you prefer pm, email or post it here?
Link Posted: 12/29/2018 8:50:37 PM EDT
Link Posted: 12/29/2018 10:02:24 PM EDT
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Originally Posted By MDWS:

Whichever you are most comfortable with. Thanks!
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PM Sent
Link Posted: 12/29/2018 10:02:47 PM EDT
So will the 24GPC run the longer 105’s or 107’s?
Link Posted: 12/29/2018 10:19:17 PM EDT
Link Posted: 12/29/2018 10:19:55 PM EDT
Link Posted: 12/29/2018 10:43:23 PM EDT
Link Posted: 12/29/2018 10:48:08 PM EDT
What does this do that the 6.5G doesn’t do better?
Link Posted: 12/29/2018 10:57:13 PM EDT
[Last Edit: 12/29/2018 11:03:55 PM EDT by MDWS]
Link Posted: 12/29/2018 11:23:18 PM EDT
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Originally Posted By BIGGDAWG:

the 105's will fit at 2.295 and longer loading
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Thanks!

Seriously looking at a 6/24 do all, but chambers and support are all over the place
Link Posted: 12/30/2018 9:09:51 PM EDT
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Originally Posted By BIGGDAWG:

the 105's will fit at 2.295 and longer loading
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Nice. That’s good enough.
Link Posted: 12/30/2018 9:13:39 PM EDT
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Originally Posted By JotaJota:
What does this do that the 6.5G doesn’t do better?
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It comes down to platform preference. Since I have a 6.8, I’m heavily invested in brass and mags, so 6.8 based cats are a simple conversion. Additionally, I like be ARP Superbolt (extremely strong bolt), higher pressures attainable and PRI mags, which are outstanding.
Link Posted: 12/30/2018 9:28:13 PM EDT
You (guys/geniuses) just need to stop fucking with my wallet. I just built a .277. And I'm already having heavy breathing over the Yetti. I swear you have something against me!!
Link Posted: 12/30/2018 9:35:04 PM EDT
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Originally Posted By MDWS:
We try not to do "better" discussions, sorry.

If theres something specific you would like to know we are happy to help answer.
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Originally Posted By MDWS:
Originally Posted By JotaJota:
What does this do that the 6.5G doesn’t do better?
We try not to do "better" discussions, sorry.

If theres something specific you would like to know we are happy to help answer.
Link Posted: 12/30/2018 9:35:34 PM EDT
[Last Edit: 12/30/2018 9:36:24 PM EDT by USSRangerSM]
Double post
Link Posted: 12/30/2018 9:59:59 PM EDT
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Originally Posted By chewbacca:
It comes down to platform preference. Since I have a 6.8, I’m heavily invested in brass and mags, so 6.8 based cats are a simple conversion. Additionally, I like be ARP Superbolt (extremely strong bolt), higher pressures attainable and PRI mags, which are outstanding.
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Originally Posted By chewbacca:
Originally Posted By JotaJota:
What does this do that the 6.5G doesn’t do better?
It comes down to platform preference. Since I have a 6.8, I’m heavily invested in brass and mags, so 6.8 based cats are a simple conversion. Additionally, I like be ARP Superbolt (extremely strong bolt), higher pressures attainable and PRI mags, which are outstanding.
I love the 6.5G. So much so I had 8 at one time. However I was looking at the 6.5Creedmoor for just a bit more range and ftlbs. Then mdws showed up with the 6.5 Timberwolf. Now I have one on the way. Basically you need to take a look at performance and see if it falls into what you are looking for. If so go for it.

I got into the wildcat game with the 22 hellcat. It was simple to convert. Just resize trim and shoot. That is what they try and accomplish with many of their cats. But they also have some that take a bit more to do. I wanted it to be easy on my first go. Now with the Timberwolf I can go further if I desire. Or keep it simple.
Link Posted: 12/30/2018 10:26:13 PM EDT
[Last Edit: 12/30/2018 10:27:43 PM EDT by USSRangerSM]
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Originally Posted By bldsmith:

I love the 6.5G. So much so I had 8 at one time. However I was looking at the 6.5Creedmoor for just a bit more range and ftlbs. Then mdws showed up with the 6.5 Timberwolf. Now I have one on the way. Basically you need to take a look at performance and see if it falls into what you are looking for. If so go for it.

I got into the wildcat game with the 22 hellcat. It was simple to convert. Just resize trim and shoot. That is what they try and accomplish with many of their cats. But they also have some that take a bit more to do. I wanted it to be easy on my first go. Now with the Timberwolf I can go further if I desire. Or keep it simple.
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I got bit by the bug of the Mongoose and the Wolverine, and the timber wolf has my interest for sure!

I've got a couple projects going right now... But I'm sure this path will be taken fairly soon
Link Posted: 12/30/2018 11:42:15 PM EDT
Link Posted: 12/30/2018 11:45:38 PM EDT
As a store owner who focuses on the AR platform I am always looking for what the future holds as I pertains to the platform. You have my attention and I will be looking into your products and brand.
Link Posted: 12/30/2018 11:52:45 PM EDT
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Originally Posted By MDWS:
Alright just an update.

Since there has been enough interest in the 25 GPC we ordered the tooling and blanks for it as well...

So we will have the 20 GPC, the 24 GPC and the 25 GPC all available in a couple months, maybe less.

The 27 is out already.

We will probably do the 28, then 26 and 30 after that, then the 22 last. We are still debating on final chamber for the 22.
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You're going to make me have to come out of semi-retirement and go to work
Link Posted: 12/30/2018 11:53:40 PM EDT
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Originally Posted By jonblack:
As a store owner who focuses on the AR platform I am always looking for what the future holds as I pertains to the platform. You have my attention and I will be looking into your products and brand.
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What got my attention was the ar10/medium chamber performance out of a short chamber ar15. These all show very high promise
Link Posted: 1/1/2019 4:13:57 PM EDT
Link Posted: 1/7/2019 5:02:25 PM EDT
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