Peter K
Well-Known Member
Can someone help fill me in on the difference between the 338 Sherman, 338 Sherman Max, and the 338 Sherman Mega?
SHERMAN MEGA LINE
- Thread starter elkaholic
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coyotezapper
Well-Known Member
I would like Elkaholic to show the case lengths, shoulder angle and case capacities of each. I would be interested in 30 or 33 cal version for a lightweight Alaska rifle.
You can do a little self research at https://shermanwildcatcartridges.com/
coyotezapper
Well-Known Member
Oh, and neck length.
I am not one to get into arguments in these forums but this seems unnecessary. Ryan is very experienced as a reloader and is clearly using sound judgement that it seems overly optimistic on the expectations. Rich has definitely been able to squeeze out some great efficiency out of the cartridges he has focused on but physics is rarely defeated and efficacy of heat builds pressure in a given volume and that is fact. All Ryan Is suggesting is to not be dangerous in the desire of performance.
VLD Pilot
Well-Known Member
He has a full time job then checking all the posts on all the shooting forums to make sure everyone is staying in the safe zone with reloading.
Elk Hunter 338
Official LRH Sponsor
Exactly!
meatyrem
Well-Known Member
Which is exactly what most out there are doing developing new and improved cartridges to get more out of something similar that's already been around. There are a number on here I have learned from that are developing new and improved versions and pushing the limits to see exactly what is obtainable. I'm sure they all test and test and test more to find out what those limits are as most times (I'm just snowballing here on this point) there is no saami for newly developed wildcats. There are a lot on here that build rifle after rifle that are not factory. Rich and many others on here develop and build and put the research and time into it. So I have to say there must be enough experience and knowledge to give estimates on what something will do based off comparisons and prior experiences. So when it comes one of their own cartridges I give them the benefit of the doubt. I'm not taking sides here just saying what I see. Yes I agree with playing it safe but there's not many ways of finding out what's safe. We all know what to look for while load developing and cartridges don't usually go kaboom without showing signs. when it come to those developing wildcats I'd say they have some type of insight as to what they're doing.
I have rounds that many others have been loading for some time now but I still refer to more than one loading manual and play it safe while not jumping directly to the upper limits.
meatyrem
Well-Known Member
Hell. Most if not all factory specs on loads are way off. I can't remember how many times I was disappointed with a particular load that was (advertised) at said velocity when in fact it's much lower than that. This was the main reason I handload so I can use various load combinations to get what I like to see and get way better accuracy than what factory roounds can produce.
meatyrem
Well-Known Member
Very true. My point on this before was anyone can do this with any round out there and it doesn't specifically have to be Rich's rounds it could be any saami round out there. You can tell someone to go by the book and they can do what they want anyhow and ignore limits.
Mr Rich do you have a time frame for development you can provide or is it still to early to estimate that?
coyotezapper
Well-Known Member
I agree with most of what you say except for the safe comment. How do you or anyone know whats safe without pressure measuring data??? Assuming something is safe does not make it safe and if you have to run harder brass to do this then is it really safe?
There is a well known member on this site that years ago - and still may claim that he can get 3300 fps out of a 28N 195 Berger with a 26" bbl with no pressure signs. Then in another thread when asked about Nosler brass he complained that he only gets 3 loadings at the most out of his 28N brass. Uhhhhh, thats over pressured!!
I have no dog in this fight but criticizing someone with an differing opinion is ridiculous. This subject is SUBJECTIVE at best because without pressure data nobody really knows.
If 70K+ pressure is ok in your book then go for it. I ran a few predictions earlier based on expected case capacities and only the 7 mega with a 195 would be under 70K. I asked for more info on these cases but for some reason, crickets. The website shows no case dimensions or case capacities at all. Why is this?
Hand Skills
Well-Known Member
Buster Hemlock
Well-Known Member
Rich, first I'd like to apologize for further derailing your thread but it's already been thoroughly derailed and your going to have to start a new one anyways for the MEGA line of cartridges.
How many guys here actually understand how SAAMI MAP numbers are come to for a commercial cartridge? How many know what modern firearms manufacturers use for Proof loads and what pressure they generate in a firearm as a minimum pressure standard for safety? This isn't pointed at guys on this thread but in general on this forum and to reloaders in general. I'd venture to say not many at all do and that is something that needs to be taken into account with published numbers and data we give out.
These questions are things that need to be known and understood before pushing above published numbers in reloading manuals and there is a lot that goes into both of these processes SAAMI MAP numbers and modern firearms Proof testing. I've been involved in some testing that I can not disclose due to NDA's (non-disclosure agreements) but if you research the two things I just referenced and actually understand them you will be able to make more educated decisions if you decide to go beyond published data.
Pressure does equal velocity but it's pressure under the curve or total pressure exerted on the projectile in a confined environment, not necessarily max chamber pressure. The number of things that effect chamber pressure and pressure under the curve is vast and beyond what I have time to post.
How many guys here actually understand how SAAMI MAP numbers are come to for a commercial cartridge? How many know what modern firearms manufacturers use for Proof loads and what pressure they generate in a firearm as a minimum pressure standard for safety? This isn't pointed at guys on this thread but in general on this forum and to reloaders in general. I'd venture to say not many at all do and that is something that needs to be taken into account with published numbers and data we give out.
These questions are things that need to be known and understood before pushing above published numbers in reloading manuals and there is a lot that goes into both of these processes SAAMI MAP numbers and modern firearms Proof testing. I've been involved in some testing that I can not disclose due to NDA's (non-disclosure agreements) but if you research the two things I just referenced and actually understand them you will be able to make more educated decisions if you decide to go beyond published data.
Pressure does equal velocity but it's pressure under the curve or total pressure exerted on the projectile in a confined environment, not necessarily max chamber pressure. The number of things that effect chamber pressure and pressure under the curve is vast and beyond what I have time to post.
