Range Maximum Energy limits

[Zigjib]

Hey Dudes;

Does anyone know how range maximum energy limits are calculated?

I'm templating a new range ATM but there's nothing in the pam regards limits. For example our normal range is 8mm max calibre and 3319 ft lbs. No one knows how that number was arrived at.

Anyone know what the math is?

Thanks

Carso

 

[Govt Mule]

Hey Dudes;

Does anyone know how range maximum energy limits are calculated?

I'm templating a new range ATM but there's nothing in the pam regards limits. For example our normal range is 8mm max calibre and 3319 ft lbs. No one knows how that number was arrived at.

Anyone know what the math is?

Thanks

Carso

E=(W*V2)/(14000*gc).

In this formula, W = weight of projectile, in grains; V = velocity, in feet per second; gc= gravitational constant, 32.174 ft/s2

That's one way of calculating energy; just have to find out what the range restrictions are for where you are shooting.

 

[Govt Mule]

ShootersCalculator.com has a plug and play formula calculator that is easy to use also.

 

[PB&J.]

Are you asking how to calculate muzzle energy?

Or how the maximum permissable muzzle energy is derived from your range template?

 

[Zigjib]

Are you asking how to calculate muzzle energy?

Or how the maximum permissable muzzle energy is derived from your range template?

Yeah got muzzle energy ok, i'm confused as to how the maximum permissable muzzle energy is arrived at for a range.

 

[Norther]

…maximum permissable muzzle energy…for a range.

Never heard of such a thing, sorry.

 

[Crewdog135]

My guess, and only a guess, is for berm damage. My range doesn't allow 50bmg or it's derivatives for that reason. They probably use the energy as a way to restrict any new cartridge without having to try to keep up a list.

 

[akmike47]

My guess, and only a guess, is for berm damage. My range doesn't allow 50bmg or it's derivatives for that reason. They probably use the energy as a way to restrict any new cartridge without having to try to keep up a list.

Thought your range only outlawed condoms

 

[zeroz]

I talked to a guy at a range once where they were adding overhead board slats above and in front of the benches to allow magnums. He said something about range limits being determined by berm height, depth and if shots could be taken at angles over the berms to allow for travel beyond range or into occupied spaces. The boards were being installed so that if someone shot a magnum at an angle to go over the berm enough energy would be eaten up by hitting the boards that the bullet wouldn't exceed the fallout distance. Another range I used to belong to bought up more land behind the range so we could shoot bigger shit. Seems it has to do with distance a bullet can travel if shot over the berms. Id think calculating maximum range for given cartridges and then figure out if you have enough space for it or if you need to add overhead protection to cut it down. As far as the math...math is hard.

 

[Crewdog135]

Thought your range only outlawed condoms

Dude, your dreaming about MY magnum and your "range rules"!

 

[Zigjib]

My guess, and only a guess, is for berm damage. My range doesn't allow 50bmg or it's derivatives for that reason. They probably use the energy as a way to restrict any new cartridge without having to try to keep up a list.

That's a good one, i didn't think of that. Our's more because template somehow, but berm damage is definitely something to consider. I do like the concept of banning without banning... ergh.... 100% possible.

I've templated everything based on the writing, i know of a few places that have had their wings clipped for max cal/ME though. Just trying to pre-empt. No idea how those figures are arrived at though. Just trying to avoid doing all this work only for the cops to turn around and say "223 only" or something

 

[Zigjib]

I talked to a guy at a range once where they were adding overhead board slats above and in front of the benches to allow magnums. He said something about range limits being determined by berm height, depth and if shots could be taken at angles over the berms to allow for travel beyond range or into occupied spaces. The boards were being installed so that if someone shot a magnum at an angle to go over the berm enough energy would be eaten up by hitting the boards that the bullet wouldn't exceed the fallout distance. Another range I used to belong to bought up more land behind the range so we could shoot bigger shit. Seems it has to do with distance a bullet can travel if shot over the berms. Id think calculating maximum range for given cartridges and then figure out if you have enough space for it or if you need to add overhead protection to cut it down. As far as the math...math is hard.

Yeah that's what i'm thinking. What they consider "max range" is another one, but baffles are common around where i'm at. We are trying to find the right land and fallout zone to avoid them because if you get baffled then you're locked to shooting off a bench or prone and it makes things hard for PRS etc.

My math is from Soviet Russia. I don't do math, it does me.

 

[TheHorta]