I’m a 25-06 guy I love the .257 it the reason for what I’m doing.
I have 25-06 ai an 25-06 an 25-284 an 25x47 an 25 cm multiple guns buy the way in all calipers 25bra my improvements an 250 savage ai an I’ve got the 257 ackley reamer don’t need it but just wonted it I’ve done it all an every powder an multiple actions an barrels. I have the loads a they can shoot! Ask me how I know?
buy the way I’ve done everything in 25-06 where not shooting 100-115 3550 fps an then trying to say it’s not safe to shoot a 115 Berger 3000 fps in a 25 basically a dasher when a 6 dasher does it easy
You have to understand, 3000 fps is totally not the same as 3500 fps,,, do you? Yes 3000 fps is probably doable in a dasher style BR case. But 3500 fps with a 115 is not, and anywhere I shoot, these guy's load HOT freakin loads, but would not want to sit next to a guy trying 3500 fps in a dasher case with any 115 grain bullet!
Next to get the 3000 you need faster powder, in which case is much spikier than the 4831 160 or whatever you would use in a 25/06 to get that 3500 fps, and do it with less pressure!! I will also say I don't have a pressure testing device, but even in a Dasher shooting a 6mm using a 105 to 108 bullet and getting 3100 fps, it aint possible near 60,000 cup. I've done it, and am sure 70,000+ is more like it!
To think any action in a 25/06 is rated for 60,000 but a BR case cartridge is only safe to 58,000 is what layers thrive on! I assure you the Lapua brass ia more than capable of it!
Now I will assure you that even a 6.6x47L case necked to 6mm is going to give you higher velocity, and lower pressure than the Dasher case can,,,, as you would say, "ask me how I know" this is why I would never stomp the the guts outa my expensive brass in the daher, when the 6x47L does the same thing and brass life is endless!
Yes the dasher can get maybe 3150 fps w/108's using a faster powder like Varget, but the 6x47L cartridge can do it mush easier, and at way less pressure, with a slower powder, that wont raise pressure dramatically from 60 degree days to 85 or 95 degree days like the dasher! In fact the 6x47L case can do even better, as will the 6mm Rem AI case even more dramatically.
To believe necking any of these to 25 changes this science, is to totally ignore common sense! In 25 cal I have dealt with the 250 savage AI as well as the 257 AI and 25/06 AI. in every case to try and equal the the velocity of the larger capacity case is going to become more dangerous the closer you get to it!!
Start slow, work up, monitor your head diameter closely, and stop when you you see .001" expansion, is my best advice to any HOT RODDER, if the bolt lift-extraction become more resistance, stop before that. In most instances, your going to see groups start opening up before that happens anyways, and that should be your main goal.
All these cartridges have a purpose, and fills them well, trying to use less powder, or a shorter action, to get the same results of the larger case with the same bullets, certainly isn't one of those attributes!
