At a given chamber pressure, the bigger the boiler, the more steam. The more steam the more energy produced. But maximum chamber pressure must not be exceeded and when using larger capacity case in relation to the the neck diameter the pressure needs regulated or reduced to permit the gas a bit longer to escape the smaller neck or exit. Example: a 30-06 will propel a 120 grain bullet 3400 fps. The very same case, necked down to 25 caliber in a 25-06 will only propel a 120 grain bullet to 3100 fps.
SHERMAN MEGA LINE
- Thread starter elkaholic
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Thanks for reminding why I steer clear of this forum! Rich makes awesome cartridges but they are still on earth where physics applies. I agree most understand but most of you seem to forget the increasing number of new guys to the sport who read this and don't know better.
3 grains is not going to be the can of spinach that awakens the popeye in a cartridge.
These outlandish and impossible claims put a black eye on otherwise great cartridges. The Creedmoor is a prime example.
As far as the 3100 claim being a realistic 3000 I guess you and I were raised differently. My word is my word. If I say some that is what it is not some percentage of it.
Have a great weekend!
He stated 83 originally then restated when I told him my 250 WSM cases were already at 83 grains fired.
Elk Hunter 338
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But its not a WSM sized case HA HA HA HA
Rich Coyle
Well-Known Member
The weakest part of the whole shooting system is the brass. If the brass is NOT flowing, how is the action going to blow?
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What do you believe is actually containing the pressure? Put 60k in a brass cartridge outside of a chamber and see what happens. Now imagine it is north of 80K.
To you guys that know everything keep doing what you are doing. To the new guys reading these outlandish velocities from these relatively small cases remover you only have one trigger finger and only one dominant eye.
Rich Coyle
Well-Known Member
Do you wear two masks when you're in your vehicle alone?
Elk Hunter 338
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and It will push a 215 too 3100 safely
please don't get on the "well your brass is crap train" 70k psi is 70k psi in any brass!! since when is brass that was designed too hold 65-70K psi bad??
You ever heard of Kirby Allen?? That guy has built and burned more powder trying new ways to get the most out of cartridges before most of the LR crowd was still figuring out drops for their favorite 300 win! that guy has sated many times he will work up a pressure load in say norma because he knows that top end loads in norma are 65k psi and lswitches to lapua not changing load but for the quality of lapua. you do realize that al these claims of velocity are competing with cases basically of same design with 10gr more capacity!!! give me a break!
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LOL! can't put together a legit argument so you turn to covid? For the record I don't believe it is much worse than the flue but I am not sure what that has to do with physics. You were one of very few I still respected on this forum and you lost a lot with that stupid question. One more reminder why I steer clear.
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We are wasting our time here!and It will push a 215 too 3100 safely
please don't get on the "well your brass is crap train" 70k psi is 70k psi in any brass!!
You ever heard of Kirby Allen?? That guy has built and burned more powder trying new ways to get the most out of cartridges before most of the LR crowd was still figuring out drops for their favorite 300 win! that guy has sated many times he will work up a pressure load in say norma because he knows that top end loads in norma are 65k psi and lswitches to lapua not changing load but for the quality of lapua. you do realize that al these claims of velocity are competing with cases basically of same design with 10gr more capacity!!! give me a break!
Elk Hunter 338
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I'm on the same page and book as rfurman24 !!
great cartridges,, fun to tinker and have different options to play around with but come on, be legit about the numbers is all we that actually do know a thing or two ask!
great cartridges,, fun to tinker and have different options to play around with but come on, be legit about the numbers is all we that actually do know a thing or two ask!
elkaholic
Well-Known Member
Correct, in the same brass the Mega will hold 3 more grains. DUH, you got me
You're ruining your image Ryan!
Yes, I think most of us got your statement intended to mean 3 grains more than a WSM.Correct, in the same case, the Mega will hold 3 more grains. DUH, you got me
WHOA! Whoa. I believe Rich is simply stating those high velocities might be possible but not the norm. If they are achieved, your brass will probably be toast in less than a handful of firings. But possible? Perhaps. Rfurman is pointing out that it's dangerous to not put those claims in context because some novice loaders may pursue that speed not knowing the danger signs of what they are doing. Nobody is wrong here guys. Much respect to Rich and Ryan both
And remember, accuracy trumps all. Doesn't matter how fast your bullet is if it doesn't connect. So 3,100 might happen but I'd bet it'll produce shotgun patterns at range
And remember, accuracy trumps all. Doesn't matter how fast your bullet is if it doesn't connect. So 3,100 might happen but I'd bet it'll produce shotgun patterns at range
