Giant guns, extreme recoil management

[Lumpy]

Awhile back someone created a ridiculously impractical caliber the .950 JDJ. And a gun to shoot it out of: https://www.youtube.com/watch?v=xohy9gWz7kk. Needless to say, a rifle that has to have dead weight welded to it to make it even bench-shootable isn't very practical.

But I wonder if a better recoil management system might make it workable. For example, there's the GM6 Lynx, a shoulder-fireable semi-auto 50 BMG. And then there was the High Impulse Weapon system (https://www.youtube.com/watch?v=HyAl9qK3Rlg), a shoulder-fired 76mm grenade launcher/mortar. While that video still shows a hell of a lot of recoil, it was firing a fairly heavy projectile. For the same total muzzle energy, a smaller projectile- like the .950 jDJ?- would have less recoil.

So let's say one adapted a similarly robust recoil management system to the .950 JDJ. It would still be a novelty gun, but would it be something one could shoot with, as opposed to a bench queen?

[OldmanFCSA]

Large bore guns shooting large mass projectiles generate recoil in large amounts.
To combat the recoil, large guns are used, much larger than any shoulder fired firearm.

However, if you don't mind muzzle blast and blast back from an efficient muzzle brake, an 18" or even 16.5" barreled 50BMG rifle can be shot from the shoulder assuming other rifle lightening techniques are used. Theory is that the projectile is not in the bore long enough to generate recoil AND the hot blast of powder with un-burnt powder will reach the muzzle brake sooner thus generating more forward pull to minimize the recoil pulse. I have seen one of these in action, being fired in 1000 yard FCSA Competition by a 12 year old girl who was the daughter of a former FCSA Champion State Arms shooter.

If you are considering one of these I would recommend the 50Whisper cartridge instead. Much more efficient with less powder burnt.

J.D. Jones, owner of Magna-Port Industries, has always thought outside the box for bigger and better, which has sometimes resulted in impractical rifles.

If you want to shoot a 50BMG rifle, let me know.

I'm thinking of creating an 18" barrel for my State Arms rifle by cutting off and re-chambering a barrel with a bad wore-out throat, and installing an ArmaLite AR-50 brake which is the most efficient readily available brake. I will let BigDog58 shoot it first from the shoulder, after pressure test loading in my machine rest setup. 254 grains (compressed loading) of powder with an 815 grain solid brass bore rider should be a good pressure test. 252 grains of same got me 2860fps from my Competition rifle. I will reload it with H5010 and SA695's for shoulder fired fun. Should make for a good video.

[Sigfan220]

At the price of a 950 JDJ it is destined to be a safe queen either way. Also the first one that everybody see's videos of was built way too light. The heavier ones are supposed to be OK.

Go 20mm - ammo is somewhat readily available - guns are available - recoil is less - silencers are available - plus they are just plain old bad ass. The only downside is the tax stamp.

[Lumpy]

Large bore guns shooting large mass projectiles generate recoil in large amounts.

True, but there's recoil and there's impulse- how high a peak recoil force one feels. The point of the HIWS was to spread out an otherwise unmanagable impulse into more of a push. Combine that with a muzzle brake and you might be able to dispense with the dead weight.

[Greg]

A few years ago a put together a 50 BMG rifle using a DPMS single shot lower and an Ultralite 50 (now Tactilite) 18" upper, with open sights mounted on the rail. It was my 50 BMG plinker!

As built it was only 14.5 lbs and had that hard rubber butt plate. It was a bit abusive even with it's good muzzle brake. I added 2 lbs of lead to the hollow part of the stock and added a Limbsaver butt pad which brought it up to a bit over 16.5 lbs. At that weight it was a pussycat to shoot, with no more than the recoil of a 3" 12 ga. The blast from the brake was impressive but it was a great gun to shoot. I may have to put another together just to use the 1,200 rounds of ammo I still have.

[Lumpy]

The joke about muzzle brakes is, the back blast may be forbidding, but it's still better than in front of the muzzle.

[Seismic Sam]

IIRC correctly, Oldman has all of us beat at 6'7" and about 375 pounds. That might have something to do with it...

That's like me and Rodentman tied together, which would set some sort of fugly world record and the gun couldn't bear to get any closer to us when we fired it...

[Rodentman]

Sam, the two of us tied together...I think there's a law against that. There should be, as a violation of common decency and a public distraction.

[Snakeman721]

Sam, the two of us tied together...I think there's a law against that. There should be, as a violation of common decency and a public distraction.

Kinda like the horrible car accident with bloody bodies strewn about....you don't want to look, but morbid curiousity makes you.

[Seismic Sam]

Me an Rodentman tied together in the desert could probably could make a hungry buzzard puke and s**t himself at the same time...

[OldmanFCSA]

Me an Rodentman tied together in the desert could probably could make a hungry buzzard puke and s**t himself at the same time...

Face-to-Face, or in a "Spooning" fashion (who's in front ???) = T.M.I.
Or
tied-together at the wrists like handcuffs.



What a lot of people don't understand is that LARGE bodied shooters FEEL more recoil than smaller bodied shooters. Reason is: the large bodied shooters require more energy to be transferred from recoil of firearm to body to start rearward movement of body. Smaller shooters are just tossed around willey-nilley.

Back when I weighed 438 pounds, I felt more recoil than I do now at 360 pounds = I admit that I am recoil sensitive (such a sensitive guy). As I get lighter, I hope my sensitivity to recoil continues to decline. (I am losing weight, although difficult with my lovely wife's excellent baking skills.

I try to keep busy in my shop with all kinds of little projects, mainly related to 50BMG target rifles and its reloaded ammo, but sometimes to little tools that make reloading easier and higher quality. One of my recent little projects was turning different diameter powder-thru expander for 45AUTO die set with radius instead of angled chamfer. BigDog58 is testing for me, even though I feel thru my testing that it is much better design than LEE's design and build. My project for re-sizing/depriming/de-bulging in 1 press stroke of 40S&W cases is working just fine. Makes for excellent looking cases after reloading on my Dillon 550 with no worries about case deformity causing FTF or FTB in my Berettas and other handguns.

Doug = OldmanFCSA

[RAGGED]

A few years ago I wanted to shoot the TRG on FClass night out at the club, but even on practice nights we don't allow brakes unless it's a dead night and we can put the person far away. So I decided to take advantage of the modular stock, a quarter turn of two screws lets the front portion slide off giving me access to the entire T-Slot. I machined up an aluminum tube and rail that holds about 8lbs of lead (ended up looking like a maglite lol), I also anodized it in the shop, came close to matching it but the sheen is a bit different as one is paint but non the less it brought the recoil down to about where it was with the brake and I now use it most of the time while also using the brake, turns that barky beast into a puppy dog.