The Accurate Reloading Forums THE ACCURATE RELOADING.COM FORUMS Rifles Big Bores 404 JefferyGo | New | Find | Notify | Tools | Reply | |
| One of Us |
| |||
|
| one of us |
Alf, I have been doing extensive loading/development on both the 404J and the 10.75x68. The interesting thing about 404 is that with modern bullets and powders, it really shines. The fact is that I have access to GS custom bullets in the 380gr moly coated, and they shoot with low pressure in my rifles. I have had 4, 404J with Kreiger barrels. One with a G& H barrel and a 10.75x68 with a Mauser barrel. The loads for the 10.75x68 Mauser with US powders moves the 350gr. Woodleigh bullet at a little under 2200f/s and no pressure sighns. This is the rifle I bought from Ray A. and he said it had a fast barrel. I loaded some GS customs in 380gr with 3.5gr less powder and the speed was about 2215 f/s. again no pressure signs. I can't shoot yet so my load development is in arrest from shoulder surgery, however, without stressing the 10.75x68 any at all, we can achieve 404J original velocities with a better hunting bullet for big game. I load the 404J to the 2350f/s level and again use either the Northfork or the GS custom bullet of 380gr. I think the pressure level is such that one can get good brass life and exellent performance and all with reasonable pressures. The penetration for both is stellar and represents a leap in usability over other 40 cal offerings. My 416 Rem. Mag. custom gets real sitcky as it heats up and this phenomenon has been reported in threads and forum offerings too numerous to discount. I think the 404J and its little brother the 10.75x68 are well suited to modern balistics and reasonable rifles. Don't you agree. square shooter | |||
|
| one of us |
I don't know what my OAL is, but every bullet I use (400 grain A-Frames, 400-grain Woodleighs, 400-grain A-Square Monosolids), lets me load to the top of the cannelure and be just off the lands. If I load too shallow into the cannalure, I touch the lands, so I am careful to load deep, then crimp. I have found Ray Atkinson's IMR 4831 loads to work very good in my rifle. I shoot 92 grains for 2350 fps. I get MOA groups with this load and no pressure signs. My rifle was converted from a .375 H&H and came with an infestation of bugs, which have slowly been sorted out. If Dennis Olson can cure the feeding problem with solids, then, finally, after four years, I will have the rifle of my dreams. I have heard other folks say that a 404 should be built from scratch if you want to avoid feeding problem. I believe them! | |||
|
| one of us |
. | |||
|
| One of Us |
I never tested IMR 4831 with my 380 bullet. That powder is too bulky for my bullets if top velocities are wanted. With mine, I had better luck with H4831SC as it will better respond to a drop tube. The 2500+fps with IMR 4831 was with a Woodleigh 400. I plan on testing other powders that have been mentioned H4895, Varget, H4350 as time allows. If anyone wants the info quicker, they can come run the machinery for 80 hrs a week and I'll go test all sorts of stuff  | |||
|
| one of us |
. | |||
|
| one of us |
Alf, I didn't mean to say I was duplicating Ray's results. Simply that I was using his powder. I tried his "magic" 93-grain load, which is supposed to produce 2400 fps, but all I ever felt I accomplished was to crush more powder than I am comfortable with. It didn't produce but about 15-20 more fps than 92 grains. I never tried a drop tube, as there's no need for one with 92 grains and I am quite satisfied with 2350 fps with a 400-grain bullet (I believe this roughly equals 416 Rigby factory ammo ballistics.) I can't imagine shooting 95 grains. Any idea what pressure I am getting with 92 grains of IMR 4831? | |||
|
| one of us |
. | |||
|
| One of Us |
Alf I might not have been clear as to what bullet I was talking about (I do that a lot ) but, yes, that was with the newer, supposedly heavier jacketed Woodleigh soft point. 26" LW barrel, groove dia of .4226"Mine went a flat 2500 with H4831SC @ 55,000psi | |||
|
one of us |
This came up before about Ray's IMR4831 load. I can't even get 93gr in w/ a drop tube & then it still crushes the powder, so 95gr, I'ld have to see it. H4831sc allows 95gr but I have never wanted to go much beyond 2250fps so I haven't tried.  LIFE IS NOT A SPECTATOR'S SPORT! | |||
|
| One of Us |
You might be able to fit 95 grains of H4831SC in the case but after one shot, you will never want to shoot again. You will be spending all your time convalesceing after the surgery to remove the bolt from your skull. That load would be rapidly approaching 70KSI. Actually, with the help of a drop tube, I had little trouble fitting 95 of IMR in the case. It was only slightly compressed, with the Woodleigh, after the drop tube, and IMR really doesn't respond to a drop tube very well. New material is coming Fred, really, it's coming  | |||
|
| One of Us |
Mike, Now you confusing me...which one of "Mine" are you speaking about  55,000 p.s.i should be a walk in the park, in terms of recoil ;  I would really like to see more information and pressure testing of H4350 and Varget...how about it  ...your a good man.I am going to start getting the 470NE package together for you soon....if I forget, please remind me...  | |||
|
| One of Us |
What part of "mine" do you not understand? You know, "Mine". The ones with the funny little ring thingies I'd love to get all that data. So get your butt out here and run the shop while I go "play" with the guns. | |||
|
| one of us |
You know Mike, if I draw an elk tag this year in Montana, maybe I'll take an extra week off & you can let me run your machines for a week. You'll have 50-60 hours of shooting time but the only bullets that will probably get made are .404s, imagine that. LIFE IS NOT A SPECTATOR'S SPORT! | |||
|
| one of us |
Wouldn't the brand of case used for load development determine the maximum amount of powder held as well as the seating depth? My RWS cases will hold at least 2-3 grains of powder more than the Norma stuff. Some folks load the bullet out to 3.6"and that is roughly one grain plus of powder over the 3.52"OAL the original specs call for. My first 404 had a large chamber and would hold 5 gr. more powder in once fired cases compared to standard non fired cases by RWS? square shooter | |||
|
| one of us |
There is some 404 brass on ebay right now. | |||
|
| Powered by Social Strata | Page 1 2 |
 | Please Wait. Your request is being processed... |
|
Visit our on-line store for AR Memorabilia
