How big is too big

[Ginsing]

Well I slugged my CVA scout v2 in 44 mag today and found it has a relatively tight bore.
It slugged to .4295"
All my molds I have now cast big for my rossi like .433" or bigger. The only sizer I have is .433" NOE push through.
Getting anything in this country is getting damn hard lately and have turned up nothing smaller.
Would shooting a .433 in a .429 bore be a little to much?
Have any of you fellas had any luck with such an oversized bullet?

[mozeppa]

i'd go no more than.4305" in a .429" bore. that's just me

[sigep1764]

As inexpensive as they are, pick up another noe sizer or a press mounted kit from Lee. Then you can size for both. And I'd go 2 thousandths over, so .4315.

[Ginsing]

I'm looking for a lee right now. Dont forget I'm in canada most stuff right now is unavailable in this country. Getting one from NOE would cost me near $60 canadian and take 3 weeks to get here. The last mold I ordered from them took almost a month.
I'm looking, my question is would it be an issue using this oversize bullet

[Winger Ed.]

I'd go ahead and order the right die.
Shooting the big boolits will raise the pressure to one degree or another,
but you may have a accuracy and leading issue too.

[BK7saum]

If a bullet will fit into a fired case (crimp may interfere), I would shoot what you have and see, especially if you are not running top end loads. It may shoot very well with 0.433 bullets. You just need to make sure that your chamber is generous enough that it isn't crimping the bullet into the case. Start low and work up.

You may need to shoot an uncrimped round or two in order to obtain a fired case without a roll crimp. (Sometimes the crimp doesnt iron out upon firing andi interferes with the check of a bullet in a fired case). or you could cast your chamber to verify dimensions.

Brad

[Ginsing]

I do have a handful of commercial cast bullets I forgot about. They are sized at .430, i can load them up and check the case mouths.
One thing this rifle has a long throat I loaded a dummy with a fairly wfn out to 1.715" and didnt touch the rifling.
Hoping I can locate a sizing die

[Green Lizzard]

My 1889 Swiss shoots a .323 bullet through a .300 bore, and it does it accurately.

Bill

[mdi]

If push comes to shove a simple sizing die is easy to make. Use a piece of steel, 1" in diameter is good, about 2"-3" long and drill a 27/64 hole through. (10.8mm drill is closer but probably hard to find). Then hone (or if you can find a 430" reamer, but again, hard to find). Taper one end of the hoe to accept a .440" bullet and use a brass rod to push/pound a bullet through (the first sizing die I had was an old Lee Lube/Size kit and it was just a 3/4" diameter rod with a hole of appropriate diameter in it an a punch). Depending on how hard it is to get a commercial sizing die and how mechanically inclined you are, it is a toss up which is easier; home made or dedicated sizing die...

[Gtek]

If you have access to a lathe a bolt with the proper pitch for your press is pretty easy to start with.

[USSR]

Would shooting a .433 in a .429 bore be a little to much?
Have any of you fellas had any luck with such an oversized bullet?

Considering that I shoot .455 bullets in my .45 Colt's .451 barrel, I'd say you will be just fine.

Don

[Oldfeller]

For best accuracy cast and size for the throat diameter of your rifle, the throat's end taper (lead of the rifling) will size your bullets without raising pressure to any discernible degree as this has been happening all along and is reflected in all cast rifle data that you can find.

Read up on folks shooting huge THROAT SIZED slugs in 6.5x55 Swedish Mausers and some even more gargantuan oversized bullets in the 8x56 Hungarian Steyr rifles.

Your pressure issue with cast slugs does not exist, really.

[Ginsing]

Ok that is good news.
This rifle really does seem to have a generous size throat. I'll fire a few of these commercial cast bullets I have and see as well. I am really excited on getting this rifle up and running. I'll report back with some performance results

[Tripplebeards]

I’m sizing .025” over in my marlin 335 35 Rem. I shot two three groups with my cast boolits out of it at 100 yards that measured .250”! All you can do is try. Your results will give you the answer. My guess at .035” over as you measured will probably work just fine. If not try to get a lee sizing die.

[mdi]

I’m sizing .025” over in my marlin 335 35 Rem. I shot two three groups with my cast boolits out of it at 100 yards that measured .250”! All you can do is try. Your results will give you the answer. My guess at .035” over as you measured will probably work just fine. If not try to get a lee sizing die.

Misplaced zero perhaps? Twenty five thousandths of an inch over groove diameter seems excessive...

[tmanbuckhunter]

For best accuracy cast and size for the throat diameter of your rifle, the throat's end taper (lead of the rifling) will size your bullets without raising pressure to any discernible degree as this has been happening all along and is reflected in all cast rifle data that you can find.

Read up on folks shooting huge THROAT SIZED slugs in 6.5x55 Swedish Mausers and some even more gargantuan oversized bullets in the 8x56 Hungarian Steyr rifles.

Your pressure issue with cast slugs does not exist, really.

Listen to the advice this man just gave you. Chamber cast, load to size of throat or just slightly smaller.

[uscra112]

For best accuracy cast and size for the throat diameter of your rifle, the throat's end taper (lead of the rifling) will size your bullets without raising pressure to any discernible degree as this has been happening all along and is reflected in all cast rifle data that you can find.

Read up on folks shooting huge THROAT SIZED slugs in 6.5x55 Swedish Mausers and some even more gargantuan oversized bullets in the 8x56 Hungarian Steyr rifles.

Your pressure issue with cast slugs does not exist, really.

Correct. The obsession with sizing for groove diameter is misplaced. This has been known for generations. It's the throat that holds the bullet centrally aligned to the bore prior to firing.

[poppy42]

Wasn’t sure what this thread was about. Kind of scared me a little that’s all I got to say about it.

[303Guy]

I would only be concerned with boolit base edge feathering if it's a plain base and then only if it negatively effects accuracy.

[Oldfeller]

Yep, listen to the old dude --- he has built a lot of bullets over the years and he knows what happens when "oversized" throat sized bullets go through the leade at the start of the rifling.

You get a fully engaged fully rifled lead boolit that is LONGER than what you had originally.

Follow the Mann "putty plug" logic and as the diameter goes down and the pressure swaging (not scraping or "rifling engagement") takes place you get a perfectly centered balanced boolit and a perfect gas seal.

BUT YOU MUST SHOOT EVENLY POWDER COATED BOOLITS WITH NO LUBE GROOVES BEING PRESENT TO COMPRESS OFF CENTER AND THROWING YOUR BOOLIT OUT OF BALANCE !!!!!!