The Hornady CM should be based off the 30 TC parent case.
Whose case they went off of i'm unsure.
Using the Ruger case makes sense, as it gives more volume than a 284 Win case, but not as much as the WSM, or SAUM case.
Quarter Bore Resurgence
- Thread starter 257Roberts
- Start date
Whose case they went off of i'm unsure.
Using the Ruger case makes sense, as it gives more volume than a 284 Win case, but not as much as the WSM, or SAUM case.
The ruger didnt need to be as big, its using a 20” barrel. Very efficient round.
the difference between 250 ai and 25 cm is very little regardless what hornady says
Infrequent Shooter
Gold $$ Contributor
Been thinking (always dangerous) about 257 bullet selection. Reminds me of how many times militaries came this close to getting away from 30 cal bullets. Pre WWI (no time to change, go w what you got), Garand, built for 280 cartridge (US General vetoed 280/7mm caliber, said it wasn't powerful enough), Post WWII, Brits developed 280 British cartridge for excellent FN/FAL. US put the kibosh on that idea, and and so on. Now, bullet makers dont want to make new 25 cal bullets. Sierra makes several 6.5 SMKs and only one 257 SMK! I think this logic is about 70% sound. I know it is not 100%, but it is right up there. GOML! SMF! I am pretty darn sure the market is there for more 257 bullets,,, chicken or the egg.
Cheers, and stay cool out there.
Cheers, and stay cool out there.
Lots of interesting cartridges have come out for the 25 caliber in the last few years.
Granted, most of them are wildcats. (Not sure if the 25 Creedmoor is SAAMI approved or not.)
Seems like more & more people are trying the quarter bore. And not just as competition guns.
But as far as competition goes, the market is definitely lagging in bullet choices for the 25 caliber.
I think with the right bullet, it may be a serious contender, especially in the 600 yard range.
p-man
Gold $$ Contributor
Infrequent Shooter I'm right there with you & JEFFPPC I'm only 3-years behind you. Where the hell did the 22CM come from? First time I heard of it was when it was sprinkled with SAAMI holy water. I mean how many similar 22 cartridges are out there? No demand for a new 22 that I ever heard about. I just don't see new OEM rifles being produced in 22CM . . . but come out with the 25CM, I bet at least Rem, Savage, & Howa will be all over it. So if money is the main driver, I can't understand this apparent blacklist of the 25CM.
Im not knocking the qaurter bore but i never really understood the 25cal why not shoot a 6.5?
School me on the love for the quarter bore
School me on the love for the quarter bore
Derrick Ratliff, the owner of Horizon Firearms in College Station,TX. was the first guy that I know of that started the 22 CM over 10 years ago. He's built and sold a bunch of them over the years.
nakneker
Gold $$ Contributor
I was always disappointed when Winchester came out with the WSM line of cartridges, I was excited to get my hands on a 25 WSM and then they went WSSM after the 270 WSM and killed that idea. Not to worry, I have a 25 Saum improved in the works. Kind of forget all about that craving until recently. Ive owned and lover a few 25-06s but the only quarter bore I currently have us a 25x47L, it gets a steady diet of BIB 110s. The Saum is being built for 110-120 grain bullets, I’m wanting to get a 110 Accubond or ballistic tip out at speed.
It's kinda like Jeeps.
You just wouldn't understand..
Why 6.5mm??
Why not a 7mm?
For some reason for hunting, they seem more effective than they have any right to be.
Especially for the light recoil.
Rube Shooter
Gold $$ Contributor
Sounds like a fun time heading your way, I use the same approach with the 3 shot groups for saving components and barrel life. Many poo poo the results of anything less than 5 shot groups but I see no value or difference in running 2 more shots in a group.
I'm fixing to start load development for some 115gr partitions for my 25-06 as I'm getting away from the 115gr Btips, hopefully they won't be too much different and it will go quick.
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nakneker
Gold $$ Contributor
That’s one I’ve always wanted to play with and haven’t. Sounds like fun!
what kind of performance you get from the bib 110?
nakneker
Gold $$ Contributor
I’m getting 3012 FPS with single digit SD and under .5 Moa 5 shot groups at 100. I’m using H4350 with 205m primers. It’s an easy cartridge to tune cartridge. That rifle has accounted for a couple deer and a few coyotes. A guy could easily pull more accuracy out of it but with my hunting rifles the goal is 5 shots at .5 or better, once I reach that goal I’m done if the SD and ES is good. Hopefully Randy makes more some day.
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Orr89rocz
Silver $$ Contributor
If sierra ever makes them again, the 110 gamechangers are a nice bullet. Good bc and accuracy for me in my 257 roberts. 2950 fps from a 20”. Saum should drive that extremely fast.
Gary in MD
Gold $$ Contributor
I'll always be a huge fan of the Big 25.... the 257 Weatherby. It was well ahead of it's time.
A 100 grain bullet getting launched at 3600 fps second gets out there in a hurry and hits like lightning on deer sized game and will also "scatter" a large varmint. The last few years I've been using the 115 grain Berger, a very accurate bullet and it will "carry the mail" out a ways! I'll hate to see this barrel give up the ghost, it's a Hart 10 twist and was spun on my markV action by Clarence Hammonds. It's made for an accurate and deadly hunting rifle.
A 100 grain bullet getting launched at 3600 fps second gets out there in a hurry and hits like lightning on deer sized game and will also "scatter" a large varmint. The last few years I've been using the 115 grain Berger, a very accurate bullet and it will "carry the mail" out a ways! I'll hate to see this barrel give up the ghost, it's a Hart 10 twist and was spun on my markV action by Clarence Hammonds. It's made for an accurate and deadly hunting rifle.
TZaun
Gold $$ Contributor
25 WSSM Imp shooting the 135 Hybrid at 900 yards today checking seating depths. 44.9 gr. H4350 pushes them around 2950 fps. I have just shy of 1100 rounds on this 7.5-twist 30" Brux and it's still going strong. I've been quite impressed with the accuracy of the 135 Hybrid. I shoot it in F-Class and it is very competitive.
Attachments
wildcatter
Silver $$ Contributor
Personally I think there I a big misconception in using a Weatherby, or 25/06 AI! First off 3000 to 3100 is all the faster you can run a bullet out of a 1-8 to 1-7 twist barrel before the accuracy starts opening back up. TO MANY RPM'S!
I will always stand behind my belief that the 257 Roberts AI is the most efficient cartrige ever chambered for the 1/4 bore! Along with a 1-10 twist being the sweet spot for speed, accuracy, and hunting weight bullets!
85 grain to 117 grain gives you as good as any for both varmint, and game up to mule deer out to 600 yards. Plus the best accuracy you can get from any bullet beyond 3200 fps. And from a 26 to 27 inch barrel, 3200 fps is atainable.
A 135 grain won't shoot any more accurate at 3200 from the bigger cases, but will be less desirable than a Hornady Interlock, Nosler Partition, or ant bullet intended to give the terminal performance on game.
The big thing is on varmints @ 3550 fps with 85 grain BT's it is devastating out past 600 yards, just don't expect it to pelt friendly.
And as far as brass goes, anything those thinking is so great for the 25/06 AI, which is no faster, with 20% more powder to accomplish the same thing, and suffer even greater throat erosion to do that, why not use those cases that are supposedly better in the 257AI?
I been there with 25/06, Roberts, and Weatherby, the BOB AI is the only 1/4 bore I would consider if I wanted one at its best. With a 1-10 twist, and nothing heavier than 117's,,, unless my target was made of paper! For anything bigger, that's when I would step to a 30 cal.
As far as I'm concerned, bige game starts at Antelope, and hunting them up to Mule Deer my caliber would start at 25. For Elk and bigger, 30 cal or 35 cal. But would never grab a 6.5, it won't do what the 25 will with varmint bullets, and no better for antilope and big deer, and I would never consider it over 30 cal for Elk or bigger!
I will always stand behind my belief that the 257 Roberts AI is the most efficient cartrige ever chambered for the 1/4 bore! Along with a 1-10 twist being the sweet spot for speed, accuracy, and hunting weight bullets!
85 grain to 117 grain gives you as good as any for both varmint, and game up to mule deer out to 600 yards. Plus the best accuracy you can get from any bullet beyond 3200 fps. And from a 26 to 27 inch barrel, 3200 fps is atainable.
A 135 grain won't shoot any more accurate at 3200 from the bigger cases, but will be less desirable than a Hornady Interlock, Nosler Partition, or ant bullet intended to give the terminal performance on game.
The big thing is on varmints @ 3550 fps with 85 grain BT's it is devastating out past 600 yards, just don't expect it to pelt friendly.
And as far as brass goes, anything those thinking is so great for the 25/06 AI, which is no faster, with 20% more powder to accomplish the same thing, and suffer even greater throat erosion to do that, why not use those cases that are supposedly better in the 257AI?
I been there with 25/06, Roberts, and Weatherby, the BOB AI is the only 1/4 bore I would consider if I wanted one at its best. With a 1-10 twist, and nothing heavier than 117's,,, unless my target was made of paper! For anything bigger, that's when I would step to a 30 cal.
As far as I'm concerned, bige game starts at Antelope, and hunting them up to Mule Deer my caliber would start at 25. For Elk and bigger, 30 cal or 35 cal. But would never grab a 6.5, it won't do what the 25 will with varmint bullets, and no better for antilope and big deer, and I would never consider it over 30 cal for Elk or bigger!
I just prefer imperial units to that metric eurotrash stuff.
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