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Discussion Starter #1
Has any one worked with this round? It is simply the 375 RUM necked up to .416 with no other changes.

I have a Model 700 APR with 22 inch bbl and 2 inch brake from Answer Products. The conversion is simply a clean up of the 416 Rem chamber, and a local gunsmith has the reamer.

I mocked up some 416 RUM cases by expanding the 300 RUM to .416, and the case holds 111 grs of water with a 300 gr Hawk seated to COL 3.6 inches. The 400 gr Hornady RNs give 97 grs of water at the same COL.
 

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416

No i haven't but i do have a 416-284 McPherson in a Savage M99R with 26in barrel,chronoed at 12ft:

300gr Barnes X 2500fps-4162fpe
350gr Barnes Solid 2400fps-4475fpe
400gr AGST Solid 2200fps-4298fpe

Not bad for a lever.
 

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Enforcer,
is this round simply a .284 necked up? I bet that 99 gives you a little thump on the shoulder.
 

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416-284

kciH said:
Enforcer,
is this round simply a .284 necked up? I bet that 99 gives you a little thump on the shoulder.
Its a little more than that. Boby taper is decreased compared to original case.Decreasing body taper does two things,first it adds 2.5grs of useable powder space,but even more importantly it improves headspace control by providing a wider case shoulder.COL is 2.825.Yes it does thump with full loads.It will and does exceed the 45/70,450Marlin,416 Barnes,458X2 American in velocity,energy,momentum,and matches the 450 Alaskan and 50 Alaskan.
 

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416-284

Joel B said:
No problems with the action? How about case life? Sounds interesting. The ultimate pig thumper!
I don't foresee a problem with case life.Though I haven't used any cases more than once yet(no signs of stress).As far as the action,no problem the Savage 99 is one of the strongest actions around.To get those velocities,I'm at 60,000psi out of a 26in barrel,per Mic McPherson.
 

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Loader,
sorry to hijack your post.:)

Enforcer,
The reason I ask is that I'm considering a 35x284 project in a XP-100. I already shoot a .284 Win in an XP, I've had it for over 10 years. I'm looking for something to get more reliable bullet performance and penetration on larger animals. I wasn't under the impression the .284 had much case taper to eliminate, but you learn new things every day. How complicated was the case formation for your round? If you could give a step by step it would be great. I'm guessing the 35x284 would be about the same minus one neck upsizing unless you do it all in one step. I view this as a 35 Whelen handgun, which I have recently started hunting with in a rifle (Ackley Improved). I really like the way it kills, but I've only used it on a whitetail doe and a black bear thus far. What have you shot with this beast? I don't doubt you when you say it thumps the shooter a bit.
 

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416-284

kciH said:
Loader,
sorry to hijack your post.:)

Enforcer,
The reason I ask is that I'm considering a 35x284 project in a XP-100. I already shoot a .284 Win in an XP, I've had it for over 10 years. I'm looking for something to get more reliable bullet performance and penetration on larger animals. I wasn't under the impression the .284 had much case taper to eliminate, but you learn new things every day. How complicated was the case formation for your round? If you could give a step by step it would be great. I'm guessing the 35x284 would be about the same minus one neck upsizing unless you do it all in one step. I view this as a 35 Whelen handgun, which I have recently started hunting with in a rifle (Ackley Improved). I really like the way it kills, but I've only used it on a whitetail doe and a black bear thus far. What have you shot with this beast? I don't doubt you when you say it thumps the shooter a bit.
I had 500 cases done by the guy that built the gun for me.So i haven't done any resizing (ie necking up)myself,just reloading already made cases.But i would assume it would be easier to do it in a couple steps when going to .416.I don't see why you couldn't go from .284 to .358 in one step.I haven't shot anything except paper with it yet,and chronoed different loads at the range.Thanks Enforcer
 

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Loader, I am a big fan of the .416 in darn near anything!
If your speaking of the .375 Rem Ultra mag and then necking it up to .416, why it should be a dandy indeed..... A lot of smackem for any those nasty critters.:D
 

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Discussion Starter #10
And what a piece of cake to do! Just run a finish reamer through and polish the chamber. You don't even move the shoulder...just take it from .487 out to .525. Bolt face is perfect and ready to go.

H, IMR or AA 4350 is perfect and 96 grs will give 100% load density with 400 gr bullets and 2600 fps with 6000 FPE. The 350 grainers will do 2850 fps and the 300s around 3090 fps.
 

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416Rum/510 Kodiak Express

loader said:
And what a piece of cake to do! Just run a finish reamer through and polish the chamber. You don't even move the shoulder...just take it from .487 out to .525. Bolt face is perfect and ready to go.

H, IMR or AA 4350 is perfect and 96 grs will give 100% load density with 400 gr bullets and 2600 fps with 6000 FPE. The 350 grainers will do 2850 fps and the 300s around 3090 fps.
Wow those velocities far exceed what I ever thought you could get,and really put a whooping on my 416/284Mc.I'm in the process of having a 510 Kodiak Express built an a Win M1886.That will give me velocities of 300grs at 2800fps,400grs at 2450fps,and 453gr at 2325fps-5425fpe out of a lever action.I'll chrono as soon as rifle gets done as loads are ready and waiting.
 

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Loader, Dag nab it, I'm gonna have to stop talking to you.
How are you doing,
I have thought about taking a 375 RUM, and necking it up to a .423" neck. kinda like an improved 404 Jeffrey?
I have not shot the .300 yet,I have found a retired Marine Corp. Master Sargeant who has access to a 1760 yard range with lots reloading goodies, so he can tell me what all I am doing wrong with my loads,;)
Have you sent the papers on the Savage yet?

John
 
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