what is the bore size of the 416's

[Oklahoma Rebel]

I am mainly asking about the ruger but also the rem mag and rigby, are they all the same? I looked in accurate but none of the 40-41 labeled molds actually said designed for the 416 so and so.

[swheeler]

The nominal bore diameter of US .416 barrels is .408, groove is +.008

[Oklahoma Rebel]

alright, thanks a lot, I was just curious, they almost never are what they say they are,lol

[fredj338]

The nominal bore diameter of US .416 barrels is .408, groove is +.008
Well maybe.
https://www.google.com/imgres?imgurl=https://upload.wikimedia.org/wikipedia/commons/thumb/7/77/416Rigby.png/600px-416Rigby.png&imgrefurl=https://en.wikipedia.org/wiki/.416_Rigby&h=334&w=600&tbnid=F-MNj6NEBOu8wM:&tbnh=117&tbnw=211&usg=__QiAiaFNwwgZIreF_CufRT3VDDmA=&vet=10ahUKEwjhsrrwt6_WAhVP6WMKHewxDtUQ9QEIKjAA..i&docid=9oaY1aKzPgjz6M&sa=X&ved=0ahUKEwjhsrrwt6_WAhVP6WMKHewxDtUQ9QEIKjAA
https://www.google.com/search?q=saami+specs+416+rigby&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwjhsrrwt6_WAhVP6WMKHewxDtUQsAQITg&biw=1413&bih=621#imgrc=wRB2gDnqqhElaM:&spf=1505761881260
https://www.midwayusa.com/product/911257/hornady-dangerous-game-bullets-416-caliber-416-diameter-400-grain-dgx-flat-nose-expanding-box-of-50

[9.3X62AL]

Diameters can be "poetic", for certain. I buy the firearm FIRST, then do "Tale of the Tape" on critical dimensions, then buy die set and mould(s).

[Oklahoma Rebel]

I know about slugging and chamber casting, is that what you mean "tale of the tape".........measure?

[swheeler]

Well maybe.
https://www.google.com/imgres?imgurl=https://upload.wikimedia.org/wikipedia/commons/thumb/7/77/416Rigby.png/600px-416Rigby.png&imgrefurl=https://en.wikipedia.org/wiki/.416_Rigby&h=334&w=600&tbnid=F-MNj6NEBOu8wM:&tbnh=117&tbnw=211&usg=__QiAiaFNwwgZIreF_CufRT3VDDmA=&vet=10ahUKEwjhsrrwt6_WAhVP6WMKHewxDtUQ9QEIKjAA..i&docid=9oaY1aKzPgjz6M&sa=X&ved=0ahUKEwjhsrrwt6_WAhVP6WMKHewxDtUQ9QEIKjAA
https://www.google.com/search?q=saami+specs+416+rigby&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwjhsrrwt6_WAhVP6WMKHewxDtUQsAQITg&biw=1413&bih=621#imgrc=wRB2gDnqqhElaM:&spf=1505761881260
https://www.midwayusa.com/product/911257/hornady-dangerous-game-bullets-416-caliber-416-diameter-400-grain-dgx-flat-nose-expanding-box-of-50

So you are confirming what I said? .416 GROOVE DIAMETER-.408 BORE DIAMETER. .408+.008=.416

[swheeler]

I am mainly asking about the ruger but also the rem mag and rigby, are they all the same? I looked in accurate but none of the 40-41 labeled molds actually said designed for the 416 so and so.

Travis, I think where the confusion is coming from is the use of BORE to actually mean GROOVE diameter. Bore diameter is the measurement of the hole at the tops of the lands, groove diameter is to the bottom of the grooves, Fred is making the same mistake. Since we as reloaders of cast need the info of both diameters, especially if ordering a bore rider mold, it is best to use the correct terms. If you are using newly manufactured barrels from a reputable manufacturer the groove will be within a couple ten thousands of an inch of stated bore and groove diameters( Remington hammered barrels being the exception I've found twice).

[swheeler]

416Rigby1.26026.186.408.41616.5


.416Rem.Mag./Weath.Mag.1.2626.186.408.41614.0

This is from Lothar Walther site, Blank diameter 1.26",length 26.186", bore diameter .408", groove diameter .416", and as you can see they recommend 1:16.5" twist for Rigby and 1:14 for Rem and Weatherby mags.

[swheeler]

http://www.accuratemolds.com/bullet_detail.php?bullet=42-400R-D.png Look here he has several of them that will work for the .416's, be it Rigby, Remington, Weatherby, Ruger or Taylor. Since you don't own the rifle you can look at his 42 caliber molds at his site.

[swheeler]

Travis this is a new take off cz 550 416 Rigby, you can have it for 150.00 plus shipping204276

[9.3X62AL]

I know about slugging and chamber casting, is that what you mean "tale of the tape".........measure?

Yessir. Trust NOTHING. Test EVERYTHING. TRUST NOTHING. Measure twice/cut once, as the carpenters say.

[swheeler]

Well you have to have the rifle to do that, he was looking for molds from Accurate so needed to find molds that cast large enough for standard groove diameter of cartridges he asked about. Listed as 42 caliber on that site.

[Hardcast416taylor]

The nominal bore diameter of US .416 barrels is .408, groove is +.008

These are the dimensions of my .416 Taylor Shilen barrel. I can`t see much reason for a cartridge larger than the Taylor for anything that exists on the N. American continent and most likely also Africa or Asia.Robert

[Oklahoma Rebel]

yes, when I said bore I meant groove, kinda like when I say floor I mean wall. hehehe, swheeler, that's a kind offer, and pretty tempting, but with the amount of powder those use, it would put me in the poor house!, I've got my heart set on the 9.3X62, well see if that is big enough for me, and the hogs and deer! thanks!-Travis P.S. how you doing 9.3Al?

[9.3X62AL]

Not too bad, sir. SWMBO is going back to Spain in a couple weeks, and with the cooler weather I'm getting caught up on long-delayed reloading projects. Might even get the furnace warmed up soon, and cast with a few new moulds--one of those in 9.3mm.

[Oklahoma Rebel]

ok, I've seen that used before, what does "SWMBO" stand for? I know I'm gonna slap my forehead and say duh! but had to ask! oh, what new mold did'ja get?

[Texas by God]

Artful told us it stands for She Who Must Be Obeyed!

Sent from my SAMSUNG-SM-G930A using Tapatalk

[swheeler]

These are the dimensions of my .416 Taylor Shilen barrel. I can`t see much reason for a cartridge larger than the Taylor for anything that exists on the N. American continent and most likely also Africa or Asia.Robert

Right on! That will be the dimensions of 99.9% of the barrels from any reputable manufacturer, maybe choked a few one ten thousands at the muzzle.:drinks:

[Oklahoma Rebel]

lol, that she must! thanks for all the info!

[9.3X62AL]

Artful nailed it. The main character in an old BBC program (Rumpole Of The Bailey) used the term to describe his better half.

[fredj338]

So you are confirming what I said? .416 GROOVE DIAMETER-.408 BORE DIAMETER. .408+.008=.416
Well yes, depending on who has made the bbl. Older spec British bores are all over the place.

[swheeler]

Well yes, depending on who has made the bbl. Older spec British bores are all over the place.

"The nominal bore diameter of US .416 barrels is .408, groove is +.008" post #2 this thread. My goodness the guy was just wanting to look through available 416 molds, he has no rifle or barrel in 416 or 9.3, just curious as to what is available as "in stock" if you will. He couldn't find any listed under 41 cal because Accurate has them under 42 cal, I provided a link.

[Oklahoma Rebel]

thanks again swheeler, do you suppose thos steel jacketed solids were bad for the bores? or does the copper plating help? I would love to get a big bull elephant one day, as well a an Asiatic buffalo

[woodbutcher]

[smilie=1: You could also add OE on the end.What is OE? OR ELSE[smilie=s::popcorn:
Good luck.Have fun.Be safe.
Leo

[Oklahoma Rebel]

lol thanks