Up and coming Wildcats

Anchorite · Dec 28, 2020

I’d go 243 Catbird (Kenny Jarrett creation). It’s a 270 (brass everywhere) necked down to 6mm. Did I say brass everywhere? And good quality brass at that. Good choice on the 243/6mm boolit....tons of development on that bore size. Keep us posted.....it’s always fun to live vicariously!

brasscollector · Dec 28, 2020

6.5-06 Have one and love it. Got a 27" barrel and it easily spits out 140s @ 3000fps +

I think my next one is going to be a 22-250 AI with a 1:7" or 1:8" twist

DocRock · Dec 28, 2020

7mm Ruger Magnum. 300 RCM necked down to .284, 1:8 twist for 160 VLDs.

Pivot Dr · Dec 28, 2020

I’ve got a 6mm Ai and a 260 Improved. Both do exactly what you desire.

LoonWulf · Dec 28, 2020

6mm-284 with a fast twist. Tho its a little long for a remington short action.

.250Savage AI, also fast twist.

22-2250AI fast twist

270Gibbs fast twist

6.5-300 Winchester long throat fast twist.

Usually when i go looking for a new cartridge i pick a cal, bullet, then case with the capacity to push it as fast as i want .........
Or i just grab something that seems interesting.........
......mostly the latter......

Chuck R. · Dec 28, 2020

Pivot Dr said:
I’ve got a 6mm Ai and a 260 Improved. Both do exactly what you desire.

I think .260AI will be my next caliber, once I find a suitable REM M7 action. I believe the "AI-ness" will bring me up to .260 MV in a 22" barrel, but while with sticking to the 20" tube. I really like the handiness of the M7s (3) I have now.

CRM284 · Dec 28, 2020

I did some research and found that Shilen is now making Savage prefits and are doing them in just about any chambering you can think of. Well maybe not that many but there are a TON!
243AI
6mmAI
6x55Imp
6mm-06AI
6x284
257AI
25-06Imp
6.5-06AI
6.5x284 Win,Norma,Lapua
Those are a few to consider. Short or Long actions are both in the mix and make no discernible difference to me. If I can fit long heavy for caliber bullets in a short I’d go that route, if not, I have no qualms with a long.

horsey300 · Dec 28, 2020

CRM284 said:
I did some research and found that Shilen is now making Savage prefits and are doing them in just about any chambering you can think of. Well maybe not that many but there are a TON!
243AI
6mmAI
6x55Imp
6mm-06AI
6x284
257AI
25-06Imp
6.5-06AI
6.5x284 Win,Norma,Lapua
Those are a few to consider. Short or Long actions are both in the mix and make no discernible difference to me. If I can fit long heavy for caliber bullets in a short I’d go that route, if not, I have no qualms with a long.

In the 6.5x284 I'd go Norma, better supply of load data and you requested some factory support, that's the ticket, 6.5x284 win can get dicey if you attempt to substitute norma data, and either will duplicate or outrun the -06 variant with slightly less powder.
6x284 has serious potential for a wild time, if as @LoonWulf mentioned, you have a fast enough twist (think 1:8) we're crushing downrange with 85 gr speers, but would LOVE to be slinging the elds. Think of it as a .240 weatherchester short mag!

CRM284 · Dec 28, 2020

DocRock said:
7mm Ruger Magnum. 300 RCM necked down to .284, 1:8 twist for 160 VLDs.

This past year I did a 280AI. So the 7mm is off the table. I did it in a deer hunting type rig. I’d like to do something in a varmint/heavy barrel gun around the 6mm or 6.5mm area. Likely 6mm. My goal is to have a stellar coyote/groundhog hun, but also be able to play at a 1000yds on steel or paper.

GoldieMI · Dec 28, 2020

if you want the Savage Prefit or Criterion Prefit- Call Northland Shooters Supply and grab one
I ordered a Criterion in 6 Creedmoor that has the long freebore for shooting VLDs for a Savage 10 I built.
simple easy and drama free

CRM284 · Dec 28, 2020

GoldieMI said:
if you want the Savage Prefit or Criterion Prefit- Call Northland Shooters Supply and grab one
I ordered a Criterion in 6 Creedmoor that has the long freebore for shooting VLDs for a Savage 10 I built.
simple easy and drama free

Northland is where I’m ordering from. Criterion didnt seem to offer the number of chamberings that Shilen does. I’ve never heard a complaint on a Shilen barrel lol. The one thing that scares me away of the 6x284 is Barrel life. But I suppose just about all those fast 6mm’s are going to eat barrels. The 257Bob ai would be a heck of a fun round. Not quite the barrel burner the 6x284 would be and companies are now making heavy for caliber quarter bore bullets which has always been its “downfall”.
Time will tell. I’m not in a big rush. And this stupid stimulus check is paying for the barrel lol. Nothing like paying your neighbors “stimulus” only for him to pay yours.

GoldieMI · Dec 28, 2020

heavy quarterbore- do a 25 Sherman Short Tactical (that's my next one I think currently) or a 25-284 with the 131 blackjacks...though I imagine the barrel life of the 25-284 might be even less than the 6.5-284 if you are pushing it

CRM284 · Dec 29, 2020

The 6mm GT looks like a good round as well. Good barrel life. Super accurate. Not finicky to handload. That’s another very possible cartridge for this build.

redneck2 · Dec 29, 2020

CRM284 said:
The one thing that scares me away of the 6x284 is Barrel life. But I suppose just about all those fast 6mm’s are going to eat barrels

Maybe a 6br. It will run to 1k and doesn’t eat barrels so bad. And, it’s obviously accurate

I don’t understand why it doesn’t get more love

Virginia Jim · Dec 29, 2020

The Czech’s had the 7.62x45. I’d like to see a 6mmx45mm in an AR platform.

Anchorite · Dec 29, 2020

There’s also this wildcat: http://6mmar.com/Super_LR.html

Looks promising.

adcoch1 · Dec 29, 2020

Virginia Jim said:
The Czech’s had the 7.62x45. I’d like to see a 6mmx45mm in an AR platform.

There is one already, it's called.....6x45.

Bcwitt · Dec 30, 2020

CRM284 said:
I came across something called the 6.5x280 Ackley. I’m not sure why it isn’t called a 6.5-06 Ackley.....????

A 280 shoulder is further forward then an 06.

adcoch1 · Dec 31, 2020

Bcwitt said:
A 280 shoulder is further forward then an 06.

Not further forward, just a sharper shoulder angle

CRM284 · Dec 31, 2020

I see where the shoulder is forward. The 280ai has a 40 deg shoulder. So does the 6.5-06 Ackley. But when you neck down the 280 ai the shoulder is further forward than if you just improve a 6.5-06. If I could “draw” it on here to explain I would lol

LoonWulf · Dec 31, 2020

.280ai and 06ai

sage5907 · Dec 31, 2020

The length of a 30-06 case from the back of the rim to the beginning of the shoulder is 1.948. The length of a 280 Remington case from the back of the rim to the beginning of the shoulder is 1.999. Using these measurements the chamber area behind the neck is .051 longer on the 280 Remington.

I looked up the 6.5-06 in the Berger Manual and it lists the length from the back of the rim to the beginning of the shoulder as 1.948 so their example uses the standard 06 case to create the 6.5-06. The 6.5-280 would have a slightly larger powder capacity. This could be an advantage on some of the slower powders like Reloader 22. Berger calculates the case fill of a 6.5-06 with 140 grain bullet and a max load of Reloader 22 at 98% so they apparently take the bullet seating depth into consideration.

CRM284 · Dec 31, 2020

sage5907 said:
The length of a 30-06 case from the back of the rim to the beginning of the shoulder is 1.948. The length of a 280 Remington case from the back of the rim to the beginning of the shoulder is 1.999. Using these measurements the chamber area behind the neck is .051 longer on the 280 Remington.

I looked up the 6.5-06 in the Berger Manual and it lists the length from the back of the rim to the beginning of the shoulder as 1.948 so their example uses the standard 06 case to create the 6.5-06. The 6.5-280 would have a slightly larger powder capacity. This could be an advantage on some of the slower powders like Reloader 22. Berger calculates the case fill of a 6.5-06 with 140 grain bullet and a max load of Reloader 22 at 98% so they apparently take the bullet seating depth into consideration.

Yep I saw that. It’s exactly what I had envisioned when the shoulder being forward was mentioned.

Jim Watson · Dec 31, 2020

Even wilder was the 1980s fad of nice Mauser sporters - preferably 1909 with the commercial style floor plate latch - in .280 Remington. Saving magazine and bolt face work. Part of the legend was "as good as a 7mm Magnum with bullets up to 150 grains." Especially when shot with reformed Winchester brand .270 brass, which was thinner to hold more powder and harder to not show "pressure signs" as early in the overloading scheme.

adcoch1 · Dec 31, 2020

CRM284 said:
I see where the shoulder is forward. The 280ai has a 40 deg shoulder. So does the 6.5-06 Ackley. But when you neck down the 280 ai the shoulder is further forward than if you just improve a 6.5-06. If I could “draw” it on here to explain I would lol

I gotcha. Took me a minute....

Up and coming Wildcats

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