300 Win Mag
- Thread starter ten ring
- Start date
The 300 Win Mag is a relatively easy chambering to load for.
With your 180 Accubonds, you could try any of the following,
with the understanding that you would start at least 3 grains below, and work up carefully.
76 grains of Reloder 22
74 grains of IMR 4831
73 grains of IMR 4350
74 grains of Reloder 19
77 grains of Norma MRP
76 grains of H4831
77 grains of IMR 7828
80 grains of H1000
Regards, Dave.
With your 180 Accubonds, you could try any of the following,
with the understanding that you would start at least 3 grains below, and work up carefully.
76 grains of Reloder 22
74 grains of IMR 4831
73 grains of IMR 4350
74 grains of Reloder 19
77 grains of Norma MRP
76 grains of H4831
77 grains of IMR 7828
80 grains of H1000
Regards, Dave.
Eagleye has listed the classics. Your rifle might prefer them varied down a bit, so it pays to start from below and work up.
Personally, I've settled on 77.5 grains of Vihtavuori N560 with that bullet. Incredible accuracy and velocity in my rifle, but the powder is expensive.
I've also found that 73 grains of IMR 4831 with any decent 180-grain bullet always gives reasonable accuracy and good velocity with rifles chambered for this cartridge. This is usually the combo I will choose when testing a .300 because, if it doesn't work, then something is wrong with the rifle or scope.
Personally, I've settled on 77.5 grains of Vihtavuori N560 with that bullet. Incredible accuracy and velocity in my rifle, but the powder is expensive.
I've also found that 73 grains of IMR 4831 with any decent 180-grain bullet always gives reasonable accuracy and good velocity with rifles chambered for this cartridge. This is usually the combo I will choose when testing a .300 because, if it doesn't work, then something is wrong with the rifle or scope.
Cbob, if you can afford it, Vihtavuori N560 is very close to Reloder 22, but it is better in all respects, in my opinion. This is why my main hunting load for my Sako uses 77.5 grains of N560 behind a 180-grain Accubond.
The last time I checked, Wholesale in Langley had this powder (and Higginson also carries it) but, as I hinted in my first post, it is insanely expensive. Having said that, it is still cheaper to buy this powder and a premium bullet and make super handloads that give you the very best accuracy and velocity than it is to buy factory "Premium" ammo loaded with these high-end bullets in .300 Winchester Magnum.
The last time I checked, Wholesale in Langley had this powder (and Higginson also carries it) but, as I hinted in my first post, it is insanely expensive. Having said that, it is still cheaper to buy this powder and a premium bullet and make super handloads that give you the very best accuracy and velocity than it is to buy factory "Premium" ammo loaded with these high-end bullets in .300 Winchester Magnum.
You have to work up the load for your rifle. No two, even consecutively numbered rifles, will shoot the same ammo the same way. Suggest you start with the powder given for the accuracy load in your manual for that bullet weight. Who made the bullet doesn't matter.
Northman999
CGN Ultra frequent flyer
- Location
- Southern Yukon
I'm using RL-17 in my 300 with 180's. It gave me more velocity than IMR 4350 or IMR 4831 and bughole accuracy.
mossyhorns
CGN Regular
- Location
- The city that rhymes with fun
Me as well. 3.6 COL and outstanding velocities in my TC Pro Hunter. I tend to get in the .750 to 1.0 inch range with this load and am more then happy with the results combined with 180g Accubonds on deer, moose and elk. Not a fan of the recoil off the bench but never seem to notice it much when afield.
I have an extremely mild load with H4831sc that is so good and consistent, it shoots like a competition load out of my customized P17 rifle with an E.R. Shaw barrel. In fact, with this load, I actually shot BETTER at this year's Tactical rifle shoot at 600 metres than I did with my Remington 700 .308 built for that purpose. The target markers could not believe what they were seeing on the target when I switched to my "hunting" rifle after using my "tactical" rifle. Here is the load: 70.0 grains H4831sc with a CCI 250 primer. It works with 180-grain Hornadys and 190-grain Nosler (or Sierra) match bullets equally well. Your mileage may vary, but I get about 2,825 to 2,850 with this load -- super mild by .300 Winchester standards. But it is insanely consistent and accurate in my rifle.
Thanks very much, I'll give that a go.
72 gr IMR4350 + 180 Nosler Partition = 3050 fps and 0.8" @ 100 yds in my M695 Tikka.
IMR4350 was the most accurate powder in both the 300 winchesters I did extended load testing on. If you try IMR4350 first you probably don't need to try anything else.
IMR4350 was the most accurate powder in both the 300 winchesters I did extended load testing on. If you try IMR4350 first you probably don't need to try anything else.
