Which case would be preferable in .35 cal or .375. Would going to a .375 give me any better knock down? Going to be a short barrel. Reloading is no problem and actually preferable! Appreciate your advise! e-mail at dennis.madriaga@gmail.com

How about the RUM case? OR the 375 Dakota? Or are you going with a short action? IF so, then maybe try useing a 375 RUM reamer and stock dies, cut the dies down till they form a 2.1" case, then run the reamer in 2.1" for a 375 WSM ish?

With the type of action I'm using, I'm limited to the size of the case. Plus the barrel length will be at most, 16". This is part of the list and choices of calibers:
http://www.competitor-pistol.com/callist4.html

the 416, 458, and 470 AR (as well as the 375, 366, 358, 338.. etc etc etc) rounds are based off a shortned RUM case.

back to your question.
the 350 rem is preferable in either event, ESPECIALLY if you just want a 35... in fact, it's a done deal.

in 375, it'll work great, too...

jeffe

jeff, that is another question I had? Would it be better to go to a 375 or even bigger, or stick with the .35 caliber? Wondering what point one would go for more caliber verses more velocity and sectional density with a smaller caliber ie .338, .35?? Again, the above listed chamberings at the Competitor caliber list is my choice, and the gun I'm looking at, in maybe a 16"?

what's your max oal?

with a 16" barrel, case capacity will be redundant, as you'll be burning powder outside the barrel

the 376 steyr is 3.15, and works perfectly...

neither the 284 or 350remmag are loading "long" enough, and should be loaded as long as possible.

the single about caliber and SD.. higher sd always means longer bullet, in the same caliber.. and being length limited, you wind up consuming case capacity by seating deeper.

honestly, if you are build a 2.85 action, build the 358 win .. 225 at 2500, with a 23" barrel,,, and will hammer ANYTHING in north america.

if you have 3.15 or more, the 376 steyr...

why am I posting this in wildcats? there's a point where there's nothing more to have.. for example, the steyr has MORE capacity than a 350 rem...

and the dies/reamers/brass can be had pretty cheap...

if it fits in the same action, and has the same performance, wildcatting is just an expensive quirk (like I can talk)

jeffe

jeffe,
Odd you said the 376 Steyr, because I ordered that very chambering early this morning, for the very reasons you stated! Factory dies, brass and ammo.

I've got one i built for myself..

built one for a friend...

loaned the reamer to another friend...

and will be shipping out the reamer for the first friend to build a second one...


welcome to the secert world of the coolest non-cat on the planet

jeffe

jeffe,
Sounds like you really have some knowledge of this cartridge! Any chance you mind e-mailing me at dennis.madriaga@gmail.com I have so many questions, and want to be sure I'm making the right choice? It will still take a while to make, but I can still change to another chambering if I wanted to a certain point. Thanks!
Dennis

Is there a place where the AR rounds are listed? I've been abit out of things for awhile and haven't kept up.
Thanks
I'm working on an 8mm at the moment.

quote:

Originally posted by jeffeosso:
the 416, 458, and 470 AR (as well as the 375, 366, 358, 338.. etc etc etc) rounds are based off a shortned RUM case.
jeffe

Most of the info is on the big bore forum. They are based on a shortened rem ultramag case, 2.65" long (can be trimmed shorter). The shoulder starts at 2.152" from the base of the case and is 36.5 deg. The body is blown nearly straight, to provide a sufficient shoulder for the 470. There is one reamer for the 416, and the the 458 and 470 are made by cutting the body with the 416 reamer, and going back with a necker/throater. Case capacity is just slightly more than a full length 375 H&H case.

The goal of the design was to get the biggest case in a std length magnum action wihout using expensive brass, or neading extensive modifications to the action, ie opening up the bolt or re-working the feed rails.

with one update... 2.55" oal all .. PLENTY of neck to hold bullets...

the 416 tops 2450 with 400s(have hit 2470 without proper load dev) 26" barrel

the 458 has topped 2300 with a 22" barrel.. with 500gr hornady's

the 470, with 500 TSX and XLCs,.. well, I stopped load dev at 2000 and changed powder and bullets... i fully expect to hit 2300, but the design was for 2200.

in each round, the cases are a small amount over the 416 rerm, 458 lott, and 470 capstick, as applicable. (2% in the case of the 458 vs lott)


and fit in a 3.5" package

jeffe

Jeff,

You mean you sent me faulty prints I'd thought the 2.65" was a tad long, and I'd forgotton you mentioned shortening them. I have the case drawings print posted at work

dang it.. i forgot to update the pic on my website.. it'll go up tonight
jeffe

Sorry for the bad pics.. it's late, and I couldn't find my good camera

416 AR with 400 gr Hornady
458 AR with 500 gr hornady
470 AR with 500 gr Woodleigh

I wonder how well the rebated rim would work in the Competitor? I have often thought of a 6.5/284 barrel for my Encore but keep coming back to the rebated rim question. Sean

I had a .284 in the Competitor, and it worked perfectly. That is why I was considering either the .284 or .350 Mag case as parent cases, but just decided to go with the factory .376 Steyr instead. Also considered their 470 Marlin and 470 Capstick, but not sure if I can handle the recoil?

Dennis,

470 Capstick? ouch! I think in a 15" tube it would push a 500 gr about 2100 fps!!!

I did manage to cast 70 odd of the new 500's this weekend. Haven't had a chance to put the .501 sizer in the lube sizer yet.

No need to size/lube them. I'll take as much as you can as cast.