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257-300 prc
- Thread starter Rem81
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I like the idea of a modern, fast twist 25 cal. The bullets are available. If Hornady did it, I bet it would be based off the 6.5 PRC if magnum. Maybe 7 PRC.
But, If I had to bet, it would be rolled out in a 25 Creedmoor format.
But, If I had to bet, it would be rolled out in a 25 Creedmoor format.
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the 300 prc case is well past the point of diminishing returns. launching bullets at those speeds in fast twist barrels gets you well above the recommended RPM levels that most heavy for caliber long range bullets can handle leaving you with very few options mostly monos or reduced loads.
much better to keep to the 80gr case capacity or lower for top performance with the widest available bullet options.
264 win mag, 270 wsm, 7 prc all would be better choices.
much better to keep to the 80gr case capacity or lower for top performance with the widest available bullet options.
264 win mag, 270 wsm, 7 prc all would be better choices.
For the 115 and lighter perhaps, but with the 145 BH, it might be a game changer. My .257 WBY propel them at 3K FPS out of 22" barrel using Magpro; just playing around with powders I already have open.
the 135 class can make an honest 3500fps in 7 twist that's 360,000rpm. well above what most can handle. haven't tied the 145BH bullets but 3300fps should be obtainable that's still 340,000rpm. in a 7 twist. Even Kirby Allen ran a 10 twist on his 257 AM for cup and core.
what is your 257 WBY capacity most are 83gr. the 300 PRC case will be 94gr. range. your WBY is closer to the sweet spot.
To much powder for no reason. That would be a 500 round barrel.
257 weatherby is about the max IMO without completely not caring about barrel life. I love my 257 weatherby, but honestly 2506AI is about the sweet spot.
257PRC based off a 6.5prc case I could understand. MAYBE of the 7PRC case, but anything above that is just a barrel destroyer.
257 weatherby is about the max IMO without completely not caring about barrel life. I love my 257 weatherby, but honestly 2506AI is about the sweet spot.
257PRC based off a 6.5prc case I could understand. MAYBE of the 7PRC case, but anything above that is just a barrel destroyer.
Mine is 1:7" and has an H2O capacity of ~84g (not powder capacity), which puts it at 308, 571 RPM with 145 BH (requires 1:8" or faster) 3000 FPS. Yes!
The question then is at what point is considered over-stabilized?
(SOURCE: https://bulletin.accurateshooter.co...nceptions-about-twist-rate-and-stabilization/)
3300 FPS at my altitude is no slouch.
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sable tireur
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You need to show us the URL for this bullet please:
Thanks!
Thanks!
not totally sure over stabilization is a problem. I am more worried about the stress induced on the jacket by extreme velocity in fast twist barrels causing problems with the possibility of less stabilization and performance at impact. there has to be a reason that Berger, Hornady and Sierra all have RPM limits of between 285,000 and 310,000 on their big game bullets.
everything has a limit to the amount of stress it can endure, it might survive the launch and the first few yards but time and distance will be the enemy of anything that has been over stressed
everything has a limit to the amount of stress it can endure, it might survive the launch and the first few yards but time and distance will be the enemy of anything that has been over stressed
Agreed! The "NUT" behind the trigger must choose wisely what bullet to launch for its intended purpose.
huntinfool18
Well-Known Member
Wouldn't you be better off going with a 6.5 cal? Same bullet weights, same speeds, better BC?
sable tireur
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Hard to define this term.
Part of the reason behind these forums is to encourage discussion and impart data to the potential users no matter what the opinion of 'better' is. Not all of us strive for better but try to understand and experiment with potentials of cartridges and components combinations.
Again, if better off, wouldn't we all still be using the .30-06 cartridge?
Diversity and the spread of knowledge!
These new heavy for caliber 25 cal billets have a great BC. So no I don't think you're better off with a 6.5. Unless you need/want to shoot something heavier than 130-145 gr.
Attachments
I have the BJ 131s and Berger 133s/135s, but the 145 BH is bad arse.
G1= .680
G7= .371
$35 for 50 (https://blackholebullets.com/see-products)
