Hi Everyone, I am a complete novice to big bores, well ok bigger than 35 Brown/Whelen. I need a big bore, squirrels at the house are off the hook. I have a Model 70 action that I will be starting with;I'm really interested in a 10.75x68. My question is should I go with that case necked to 416, are more 416 bullets available? Should I go with a wildcat off of 8x68 case? Anybody got a 10.75x68 reamer?

I believe several of our Members have owned 10.75x68 rifles. Hopefully, they will chime in.

However, I have to ask: is there a particular reason you want to use the 8x68 case, when you could use a Rigby case (or, if you do not mind a belted case, the .375H&H)?

It's not like 8x68 cases are widely available in the States.

George

Depending on which Model 70 action you have you may want to consider the 404 Jeffery. That 400 grain .423 diameter bullet is just about right for varmints out to 150 yards. Here's my 404 on a Model 70 action:



Otherwise, why not just have it chambered for the 416 Remington Magnum? Not a lot of work involved if you've already got a magnum bolt face.

The 10,75x68 is superb as it is, but can of course be necked down to .416.Originally it will give you a honest 2200f/s with a 400 grs bullet, do not expect that if necked down. If you want a wildcat, I'd wait for the .375 Ruger to neck down, or go for Jeffe's .416 AR.

quote:

Wink: That 400 grain .423 diameter bullet is just about right for varmints out to 150 yards.

What are the specs on 416 AR? Is there a .423 AR? Should I go with .416 or .423? It looks like there are more 416 bullets, is that the best way to go?

if you do a search for 470, 458 and 416 a.r. you will find hundreds of posts...

everyone is verrrrry happy with their a.r. carts...it will do 400gr@ 2400 fps with lower preasure than the 416 rem

https://forums.accuratereloading.com/eve/forums/a/tpc/f/...=769108843#769108843

One of the reasons I was interested in 10.75x68 was from reading the forum that appears to be easy to make feed well. Will the 416 AR feed as easy? Has anbody tried both?

well i wish jeffeosso would chime in here but he posted here that his 470 a.r. is the best feeding rifle he has had. i think the feeding will be great, just make sure a good smith does it.

10,75x68 Mauser, orig. Mauser action made 1934,
hammerforged Heym barrel (600mm), all parts installed by my dad and me.


Shot´s 1"-1,5" groups at 100m with RWS 347grs FMJ and at the same point with 347grs SP Woodleigh befor 66grs of R902.

Martin

Wink Who made the barrel on your 404and what is the muzzle diameter That thing looks great
and the barrel looks like it might help in recoil Dave

If it were me I would go .416 Rem and be done with it. Lots of bullets available, and it's not a wildcat meaning that you just might be able to find ammo in a pinch. I don't think the pressure issue is even worth mentioning any more.

with all due respect and in humility..."in a pinch" 338 win mag is considered a big bore in the lower 48 and hawaii...the only place to get big bore off the shelf is in africa and alaska and limited in alaska...

if he is wildcat shy he would have not mentioned necking to 416...

pretty much all big bores are wildcats if the qualification is finding ammo at the local gun shop.

Boomy, don't get me wrong, but if, and this is a big if, he is looking for practicality, then it makes perfect sense to build a rifle that is not a wildcat. And I disagree with your assessment that all big bores are ËwildcatsË- so to speak as .416 Rem ammo is available from retailers and is not a custom proposition. Now, it all depends on the gentlemen who started this thread and what it is that he is wanting from his big-bore. My local gun shops in Florida and California all had big-bore ammo on the shelf albeit in limited quantities -- but I digress as it can always be ordered. I live overseas where reloading and playing are not possible, so I tend to go the practical route whenever possible. Again, if he wants a toy, I agree he should build a wildcat.......

oh, forgot to mention 45-70 is readily avaliable...to bad its not a "big-bore"

i say better to do the 10.73x68 if he likes it cuzz it will be easier than a reg wildcat but it it is all about feeding than the 404 jeffe is the way...or my "wildcat" of the shortened cal length neck version to fit in a std action. i made a dummy round and it is kinda cool...all the good things of the regular 404 jeffe but a smaller action and not reeeeeely a wildcat. just .2" shorter neck

to each his own!

build a 500 jeffery - you will never regret it
like you probably will if you build some home made wacko caliber nobody ever heard of !

Why go to odd cartridges when there are plenty of standard types? Easy finding brass, etc. I like the .416 bore & would go to a .416 Taylor...very easy to form brass for, and efficient cartridge that will give you .416 Rigby Factory ballistics in a neat, short case.
Best Regards,
Tom

quote:

Originally posted by riflegunbuilder:
Hi Everyone, I am a complete novice to big bores, well ok bigger than 35 Brown/Whelen. I need a big bore, squirrels at the house are off the hook. I have a Model 70 action that I will be starting with;I'm really interested in a 10.75x68. My question is should I go with that case necked to 416, are more 416 bullets available? Should I go with a wildcat off of 8x68 case? Anybody got a 10.75x68 reamer?

10.75x68 and 8x68 are very different. The 10.75 has a base of .495 and the 8 has a base of .522.
The 416 AR is .550 and 2.65 long, as boom says it's all you'll need. jeffeosso is working on proper headstamped brass as we speak.

No question about 416's being more widely available - bullet types, weights, construction, you name it.

If this is your first "jump" to something over .35 caliber, you may want to think about what you're going to do if you don't like it. A 416 will resell better than a 10.75 (.424).

And performance wise I'm not sure what you pick up when you compare it to, say, a 416 Rigby. The 416 puts out 410 grains at close to 2400 fps with muzzle energy of a little over 5000 foot pounds. The 10.75 pushes 347 grains at close to the same velocity measuring 3750 foot pounds.

It launches a heavier bullet than the 375 H&H but with less energy.

The spare parts and reloading components are widely available for the 416.s and 375's, which is a consideration.

Don't get me wrong - the 10.75 is a darn good caliber. The only thing bad I ever read about it was not the result of the round but the result of a flood of cheap rifles in that caliber during John Taylor's time.

And since you are knocking on the nitro caliber door with a 10.75......the 450No2 is right there.



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I think direction is needed here. Will you take the rifle to Africa? If so, you need brass headstamp to match the caliber markings on the rifle. If not, build something you will enjoy shooting and looking at. 416 Remington is a good choice, and will match the factory specs on the 416 Rigby. I think a 375 Ruger would be a great choice, if it is as advertised. A 404 Jefferies would be hard to beat. The AHR series in 416/458/470 would give you world class power, and not require much reworking...and the promise of brass to come.

regards,

Rich

I vote for the .404jeffery. It will fit & funcion nicely in your M70. There are wuite a few .423 bullets now, NorthFork, Woodleigh, Swift & Barnes. I think Horandy will get into a 400gr soon as well. Brass is readly available from Norma & can be easily made in a pinch from RUM brass.
WInk, I like your .404J, the bbl. is massive, what is the contour/muzzle diameter?

Idaho Sharpshooter is correct...depends on what you want to use it for...? Everyone will have their preferences...I'm of the "Old School" where I'm a fan of P.O. Ackley's opinions of an "efficient", non overbore (or less overbore cartridge)...so my opinion reflects this philosophy...I don't like extreme cartridges where the same results can be done with a moderate cartridge type.
So, it boils down to your taste, your useage, your own likings, lets say. In my opinion, I like short, efficient cartridges...I like the .416 Taylor & the .416 Remington is good for a standard cartridge. That said, for instance I wouldn't like a .585 Nyati...lots of Cape Buffalo have fallen to the .416 Taylor...so why the .585 Nyati? Overkill, overbig, over, over!
Best Regards,
Tom

Dave Sorel and Fredj338, I bought the rifle from another AR member so my information comes from him, I didn't have the rifle made. I understand that there is a #3 Kreiger barrel hidden under the barrel sleeve which is an outer sleeve muzzle brake made by American Safe Arms (which I am told is in Utah). It shoots one hole groups, the iron sights are right on at 50 yards with my loads and it recoils a little less than a .375 H&H. Flawless feeding with my loads. It also seems the action was slicked up by somebody who works at Dakota Arms. I am willing to enter a timed rapid fire contest with other bolt action big bore rifle shooters. Anybody thinking about coming to Rambouillet?

I guess I should define my goals for the rifle more. I am building the rifle as a toy or project today. I hope to make it to Africa in the next 5 years. I am hoping to duplicate 416 Rigby #s +/-. Jim Manion mentioned 450#2, what does it look like? Will it fit in a M70? What do the #s looklike when you compare 416 Taylor,416 AR, and Rigby? I don't mean to sound dumb, if we were talking about building 6BR or 6PPCs I could jump in but this is unknown area to me. As far as building a rifle and $$ goes, if I make a mis step in caliber selection I'm just out the cost of a barrel blank however I would rather buy a reamer I could build someone else a rifle in to offset reamer cost.