500 Jeffery and the 750gr A-Max Tests

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by Brent, Jan 9, 2004.

  1. Brent

    Brent Well-Known Member

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    Just got back from shooting the rifle for the first time a bit ago.
    After 2 rounds my brother mentioned he had a headache all morning, and this was killing him every shot. Well, after 5 rounds, he told me to shoot the rest of 'em his headache was just too bad.

    For some perspective -
    The recoil as much, or a bit more than I expected, although when he was shooting it, it looked fine. It was more than both 50 BMG's I've shot, the Grizzly and the AR50 both. Twice what the AR50 was becuase of it's very efficient brake design, but very bulky too. Recoil got worse with the hotter loads, and should be pretty noticable when the get to 2400 fps or so. [​IMG] It recoils about like a light 338 Ultra with hot loaded 250's and no brake! Not quite like a 375 Ultra or 378 Wby, more of a big push though. It's not like a 300 WM or Ultra...

    Ruger #1 (early 80's model w/ adjustable trigger)
    36" Pac-Nor barrel
    Custom design brake (extended Holland Quick Discharge variant)
    NF NXS 5.5-22
    Farrel base (20 MOA + 6 MOA barrel taper)
    Leupold QRW's
    Custom made stock (shaped from 4"x12" blank)(not quite done shaping and finishing it)
    Harris bipod


    500 Jeffery 750gr A-Max at 4.65" OAL -

    IMR4350 106-111gr 36-42k psi 1980-2180 fps

    H4831SC 108-112gr 31-34k psi 1897-1989 fps

    RL22 108-112gr 30-37k psi 1900-2065 fps

    We shot these in 1.0gr increments, 16 rounds in all. Pressures are still way low, should end up with 2350-2450 when they get up there some more.

    Here's pix of the rifle, and one of the current brake design. I say current because he's going to go build another one now that's a bit bigger and more efficient for this big boy. The extra set of slots in it over the Holland isn't quite as good as it could be. The new one will have more slots and might even be a lot longer with slots angled rearward too. Shouldn't be too hard to improve it quite a bit to at least 300 WM recoil levels.

    [​IMG]

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  2. Nighthawk

    Nighthawk Well-Known Member

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    Looks pretty kick ass Brent. I also noticed your pressures were not very high, any way you could get more power out of that small bullet? [​IMG]

    [ 01-11-2004: Message edited by: Nighthawk ]
     

  3. Guest

    Guest Guest

    Hi Brent
    How heavy is that big fella Brent?
    I have a nice custom Jeffery built on a pre'64 action converted to single feed and pregnant floorplate. This rifle was built as a heavy dangerous rifle in the reverse of your experiment there.
    Mine has 23" barrel which is very accurate with Woodleigh projectiles.This rifle tapps out pressure wise with 570gr at 2250fps so that long barrel is really gaining for you.
     
  4. reed mosser

    reed mosser Well-Known Member

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    That rifle looks great. Truly one of a kind. The 750 amaxes should be devasting on game. The tank style breaks are very effective. On the few 50's I shot the tank breaks kick less. I am switching over to either tank or JP breaks. They do work better than the Vias style breaks I have on my guns. Keep us posted interesting project. Reed
     
  5. Brent

    Brent Well-Known Member

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    The brake could definitely be more effective, he was thinking of ordering a brake from Armalite for the AR50 and using it, it's big and bulky so he was thinking one off the 338 Lapua AR30. In the end he just made this one to try out first. He's going to improve on it and see what he comes up with.

    I shot an AR50 50BMG with the tank type brake quite a few times and it recoils about half what this does, it's a pussy cat, bout like a heavy 308 is all. BUT, the blast rearward is HORENDOUS and you MUST be DIRRECTLY behind the RIFLE!!!! If you aren't, ugh!!! You'll feel like you got punched in the nose! It's MEAN! [​IMG] Blows stuff right off the bench way off to the side. I grabbed this guys spotting scope off the bench one time as he stood right next to my friend Shawn who just set up to shoot the AR50 and was about to fire. This guy just stood 4-6' away next to him, obviously nieve and had no idea what was fixin to happen when Shawn pulled the trigger!!! I told him to get the hell back or he'd regret it!

    Derrick said it weighs 17 lbs as you see it in the pic, but this 30-338 Lapua I have weighs 17 and his felt about the same holding them both at the same time, his might be a tad heavier if any. I should have grabbed the scale cause I don't know how he weighed it.


    Aussie,
    Dave, my smith has a 500 Jeffery break down rifle, 9 lb kick you ass express sight DGR.
    He just got back a while ago from a hunt down in Australia. He's got a bunch of vidio I haven't seen yet. My brother was telling me when we were out to shoot that beast there, that Dave was with a guy hunting Buff that was shooting a Marlin lever in 45/70 with super hot loads, hottest they make for the thing. He said he shot this Buff in one shoulder 3 times with that thing, the Buff never even flinched! He turned around 180 degrees and the guy shot him in the other shoulder... 3 more times! Derrick said, he's watching this thing on the vidio and it never even fliched, every single shot. He wouldn't have believed it unless he seen it himself. He said the Buff just stood there looking at them. Davie handed the guy his 500 Jeffery and said, "here, shoot him with this" He grabbed Davie's 500 and shot him one time and the bullet literally smashed his body to the side and he fell over instantly! He said it was AWESOME!

    I'll post a pic of the solid they recovered from Davies 500 out of his Buff, Derrick said it's somethin like you've never seen after hitting them huge bones. He said he didn't think steel could do the damage it did to that solid...

    I can't remember how thick he said the hide is on one of the buffalo, but it was thick as hell!!

    It looks like we'll get 2350 fps out of this by the Quickload data, maybe 2400 or more if we're lucky.
     
  6. Guest

    Guest Guest

    Hi Brent
    Funny thing is that I have never shot a buffalo here in Australia [Asiatic Water buffalo which are feral] but I have had a go at Cape Buffalo in Africa several times.
    There have been times with them when I felt that nothing you can hand hold would get their attention - maybe need a 20mm or bigger!
    The first bull I shot was with an old 500/465 H&H and quartered him from the front near side first whereupon he did turn slightly to offer the same shot from the other quarter - off side shoulder.
    at the second shot he trotted off. Seemed like I shot him with a 22lr insread of 480gr at 2250fps and about 50yds. He did go another 200 yds or so before he went down and had to send in a finisher to the brain.
    The .500 Jeffery is definitey in the next rung up power wise from the 450 range of cartridges. I have had 570 gr solids exit from broadside shoulder shots on a grown bull elephant.
     
  7. Brent

    Brent Well-Known Member

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    Asiatic Water Buffalo is what he was shooting there, I don't think you've got Cape Buff there do you? I only know what he's been telling me about your place, he said he's got friends there and it's WAAAAAAy cheaper to hunt Buff in Australia.

    I've watched a lot of Buff hunting on vidios, a bit of Elephant, none of them look easy to kill, at all. Whole nother ball game with them giant beasts!

    Maybe he's got some of those vidio clips on digital, might be able to load those Buff shots on a clip so you all can see it too? I'll see, I know a friend of his has a nice digital vidio camera, so maybe they can put something together...
     
  8. Guest

    Guest Guest

    Nope no Cape Buff here and I cannot compare them to water buff as already related.
    I have shot a lot of pigs here[some as heavy as 350lbs] and they take a hell of a lot of bringing down unless the first round takes out the shoulders and spine. Pound for pound the old hog takes an immense amount of punishment! Now if you have shot some of these 'ol boys imagine a hog at 1600lbs plus with inch thick hide and a natural culling programme administered by the local Lion pride. The survivors are mighty tough!
    What are you guys planning to shoot with the single shot?
    Do you hunt bear up there?
     
  9. Brent

    Brent Well-Known Member

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    I think he said they killed some Hogs too, not sure what else. He said the Buff are no different than Capes, they can be mean and just as hard to put down, different horns is all. (I still haven't ever seen a pic of one tho)

    I was thinking he said parts of the hide were over an inch or more thick! Do they use the hide for something cause it's so thick? I was thinking he said they did, just escapes me tho...

    Yeah, Bears and Moose is what he plans on using it on, Bison if he draws a tag for one. Moose mainly. Not something you go packin in the brush after big BB though!

    He's got a M70 470 Capstick he built last year that's real light, kicks like a SOB too! They took it up to Delta to kill a Bison with it. A friend has a tag and they been up there lookin for them a couple times and just missed them. A friend of the family, Eric H. has a farm up there.
     
  10. reed mosser

    reed mosser Well-Known Member

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    Brent, One of the fifties I shot had a break copied off of the AR-50. I think it had three baffles on it instead of two. It look like it was made of of 1/8 inch steel or something. Anyone with a mig welder could make the break. I am sure your gunsmith would make you a fine break. It looked a little crude but it worked excellent. I think the smith only charged that gun a 100 bucks for the break. But that gun smith was no welder. thanks Reed
     
  11. Guest

    Guest Guest

    The buffalo hides have to be skived down to be usable. The leather is very tough though - I have 2 soft rifle cases made from the one of the first Cape Buffalo I shot 20 years ago and all they need is a bit of leather conditioner ocassionally to look like new.
    I did not know that there were any bison up your way! Are these wild or managed game gone wild?
    What are the hunting seasons there?
    Do you shoot any birds?
    I have a shoot each year in NZ and amongst that spend a few days decoying Canada geese.
    When everything works this can be quite exciting as they are very big birds. they were released in NZ a long time ago and have bred up to pest populations in some areas.
     
  12. Matthew Gregory

    Matthew Gregory Active Member

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    Cute American Bulldog, Brent!

    The rifle's nice, too. [​IMG]
     
  13. Brent

    Brent Well-Known Member

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    Yeah, Dalton's 1/2 American Bulldog (Father), 1/4 Bull Mastiff, 1/4 Pit Bull.

    130 lbs fatso right now, thinks he's a lap dog. Looks just like his father. Mother had to have a sea section they were so damn big, she had puppies for three days! We thought she was done, then out came another one! She was looking sick and had black discharge so we rushed her to the vet on Sunday, they pulled 3 more out of here. One had been dead for a long time and he said it was a wonder it didn't kill all the other ones it decayed so much.

    I had to pull Dalton out of her breech he was so damn big and comming out backwards. He had died too, along with half the other ones born. He twitched comming out so I gave him mouth to mouth and thumbed his chest hard and his heart started beating! He began breathing again and it was squakin like the others in seconds...
     
  14. reed mosser

    reed mosser Well-Known Member

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    Don't feel bad about your dog being fat . mine is too. I have a american pitt bull that eats like he will never eat again. he is a great dog ,very friendly. And a real meat hound. He tracks all the deer and turkeys that my buddys shoot with a bow. finds them every time. He is two years old and 110 pounds. I just got them a fresh roadkill deer yesterday and they are in their glory. THey already ate half of it.