.300 Win Mag as a cast round?

[richhodg66]

Local Pawn Shop in town has one of the Remington Long Range in .300 Win Mag, the rifle with the long heavy barrel and Bell and Carlson bench/varmint stock.

I'm not a magnum fan, but am a .30 caliber cast bullet fan and was wondering if the huge case and short neck would be as detrimental for cast shooting as conventional thought would say? Considering the rifle looks brand new, the asking price of it is very fari (550) and I get along well with the owner so could likely do a bit better. All I'd need is dies and brass.

Anyone done cast much in a .300 WIn Mag?

 

[Ben]

All that case capacity was designed for use with slow burning powders.
Just the opposite of what is needed for good .30 cal. cast loads with some of the non - magnum 30 cal. cartridges.

Won't be nearly as easy to get quick success as the 06' or the .308 Win.

 

[Rick]

I got great results in the 308 with cast. Fastest powder I tried was SR4759.

 

[richhodg66]

I would have preferred it in .30-06, just wondering how much it mattered.

I have dedicated cast rifles in '06 and .308, so guess I'll just stick to that. Remington made this one in .30-06, seems hard to find a heavy bench gun in .30-06.

 

[RBHarter]

Paper patch maybe . There was a fellow that was getting sub MOA with 3000 fps 180s in a 300 RUM .

 

[fiver]

works fine.
Lyman no-3 has good data.
only downside is buying brass.

 

[dannyd]

RCBS 168 Silhouette, Unique and LRP. Shot 3,160 of those out of a Ruger 77 and the down side is buying the brass, but with cast bullets last a very long time.

The rifle cost me 400.00 dollars, only 30 caliber bolt gun I could afford at the time.

 

[Rushcreek]

I tried it a few weeks ago.
In my rechambered Remington 1917, I used the C309200 Lee sized .309” and PC’d over 1.6cc (20.8grs) IMR 4227.
I only tried it for twenty rounds, but no real drama occurred. My best group at 40 yards was 1.5”(5shots) but 2” was the norm.
Jacketed didn’t do much better, but that’s maybe my 100 plus year old barrel.
The gas check is way down there in the case if that matters. Cast loads did make the boomer fun to shoot, though!
I may return to it when Summer ends in November…..

 

[Ian]

I haven't found a rifle yet that wouldn't shoot 1.5 MOA all day long at J-bullet load level with a properly prepared case and powder coated bullets.

 

[dannyd]

When I showed up at the Simulated "F class match" with a 300 win and using cast bullets , the guy running it had a meltdown. He was not going to let me shoot those things at his match. I ask him if I could shoot 5 rounds and if they were in the black could I play, he finally relented. After that he kinda lighted up on me.

The match was on a 200 yard line using scaled down targets, shot it for about 3 years. 60 rounds possible 600, I don't think I ever got passed 540.

 

[richhodg66]

Think I'm gonna let this one go, good deal for someone. I just don't need to set up for a new caliber unless it's something real interesting (i.e., historically interesting).

If this were a .300 H&H...

 

[richhodg66]

Do .300 Win Mags tend to have longer throats to help with that short neck? Someone mentioned the gas checks being inside the case, which I'm not sure that's as big a problem as conventional wisdom says it is, but it makes me a little nervous anyway.

 

[Rushcreek]

I have just a smidge of this groups cast bullet experience, but the 6.8 Rem,.300 Savage, .308, and 8x57 have taught me not to care about the gas check below the neck.
I understand about not needing/ wanting the .300 WM for cast if you’re already covered with .30 caliber cast vehicles-(30-30,30-40, and 30-06 here).
I looked longingly at a Mauser 1891 sporter in 7.65 yesterday……it was overpriced of course, but dies and brass and all that for a “similar” cartridge didn’t make much sense- if it had been at the 2019 price, I’d have got it.
I bought a new tire for the Mule instead.

 

[dannyd]

Do .300 Win Mags tend to have longer throats to help with that short neck? Someone mentioned the gas checks being inside the case, which I'm not sure that's as big a problem as conventional wisdom says it is, but it makes me a little nervous anyway.

The gas check is below the neck, but worked fine for me out to 200 yards.

Funniest thing was someone shooting real 300 Mag and your shooting the mouse fart cast bullet loads like there 22 Long Rifle. The look on their face because their trying to understand why it's not kicking the crap out of you.

 

[quicksylver]

I tried it a few weeks ago.
In my rechambered Remington 1917, I used the C309200 Lee sized .309” and PC’d over 1.6cc (20.8grs) IMR 4227.
I only tried it for twenty rounds, but no real drama occurred. My best group at 40 yards was 1.5”(5shots) but 2” was the norm.
Jacketed didn’t do much better, but that’s maybe my 100 plus year old barrel.
The gas check is way down there in the case if that matters. Cast loads did make the boomer fun to shoot, though!
I may return to it when Summer ends in November…..Try a larger bullet the 17' barrels need at least a .313 bullet

 

[oscarflytyer]

All that case capacity was designed for use with slow burning powders.
Just the opposite of what is needed for good .30 cal. cast loads with some of the non - magnum 30 cal. cartridges.

Won't be nearly as easy to get quick success as the 06' or the .308 Win.

and why I parted with my 300 WM. Loading it down just made no sense.

 

[dale2242]

My Weatherby MKV in 300 Weatherby magnum shot quite well with cast.
If I remember correctly it was 311291 with 25 gr. 2400 and 1 gr. Dacron.

 

[richhodg66]

Dropped in that shop yesterday and that rifle is still there.

#1 son is doing some rather intense training with the Army right now and was talking to me about some experience he had recently with a tricked out 700 in .300 Win Mag on a 1000 meter range. Beginning to think this rifle needs a home, it's certainly priced well for what it is. I have a pretty good 7mm Mag sitting around doing nothing for me I could trade off and all I'd need is dies and some brass.

I should stay out of gun shops.

 

[RBHarter]

You what the real joy is ? We can run a 175-212 gr paper patch bullet on up to to max 1000 yd high velocity wind bucking target master or load it down to a 25 yd 32acp pop can crippler .