Best Over All Powders 300Win

[truck driver]

What powders have been used the most in the 300Win for obtaining the best accuracy?
Not looking for max loads since I want to save my shoulder.
I have a variety of bullets handy from 125gr AB to 180gr Hornadys probably more 165gr Hornadys and partitions then anything.

 

[mjcmichigan]

My model 70 300wM loves IMR4350 for 180gn AB

Sent from my iPhone using Tapatalk

 

[TackDriver284]

I am using 74.5 grains RL-22 and a 180 AccuBond at 3,190 fps. First two shots at 300 yards ( no kidding ) two touching, waited 3 minutes, second 2 shot group to confirm. Penny was for size comparison and no I did not use it to cover another hole. :lol: RL-22 is a temp sensitive powder, but have not had any issues with the .300 Mag. I will not need to find another load or bullet. I am sticking to this load for all my hunting needs. :grin:

Other great powders are H1000, RL-26, H4831 which is more temp stable.

 

[JD338]

Roger

For me, 75.0 grs RL 22 and a 180 gr bullet has shot well under MOA in 3 different 300 WM rifles.

JD338

 

[mjcmichigan]

Lol. So much help 5+ powders all shooting lights out In the 300WM!


Sent from my iPhone using Tapatalk

 

[Wincheringen]

RL17 which is also in the 4350 burn speed category works well for me. I've also been happy with RL22 and 23.

 

[diverdown]

I tried IMR 4831, IMR 4350, RL22 and then went to the new RL26. I'm very pleased with this powder and the 180 Grain Federal Trophy Bonded. 1 1/4" 200 yard groups keeps me satisfied every day of the week.

 

[truck driver]

Looks like a good list of powders so far.

 

[Divernhunter]

RL17, IMR4350 and RL22 have worked well for me using 150gr Nosler PAR and Swift 165gr A-Frames.

 

[truck driver]

RL17, IMR4350 and RL22 have worked well for me using 150gr Nosler PAR and Swift 165gr A-Frames.

what's your starting load with R17 and a 165gr bullet?

 

[TXbaldhunter]

This was shot using 71.0grs of IMR-4350 powder with 180gr Sierra BT at 200yds..

 

[SJB358]

I have used RL19, 17, 22, 26, 25, IMR4831, H4831, IMR4350, H1000 and Retumbo in a couple 300 Win's. Bill uses H4350 with 180 Partitions and gets crazy accuracy from his old 70. Pretty easy to feed cartridge in my opinion and usually doesn't require a bunch of trick moves to work well.

 

[truck driver]

Went searching threw my powder supply and found some H4831 that was open and a partial box of Sierra 150gr HPBT match bullets I once used in a Garrand so I loaded up 10 with a starting powder charge to get some once fired cases so I could get some H2O caps.
I do have a few bottles of R19 but the burn rate is slower then predicted and the velocity is all over the place with it in my 338Win and not happy with it.

 

[SJB358]

Went searching threw my powder supply and found some H4831 that was open and a partial box of Sierra 150gr HPBT match bullets I once used in a Garrand so I loaded up 10 with a starting powder charge to get some once fired cases so I could get some H2O caps.
I do have a few bottles of R19 but the burn rate is slower then predicted and the velocity is all over the place with it in my 338Win and not happy with it.

19 is a powder that has always came together better for me once it hits the upper operating PSI's. I wouldn't be surprised if it worked real well for you. With those big cases, having a couple of LB's on hand isn't a horrible thing since changing lots of powder after finding a great load is a pain I prefer to stay away from.

 

[truck driver]

Shoot I miss wrote the powder lot burn rate was slow and meant to say the powder didn't give the intended velocity and was slow. The ES was all over the place very inconsistent.
It could be that the charges were too light to give consistent velocity readings but gave up on it when I found something that worked better.

 

[SJB358]

Yeah, slow powders like 19 really are and can be erratic till they are up a little higher on the PSI curve. 19 is a solid powder though. It may work out just fine for the lighter bullets you are looking at running.

 

[truck driver]

Not really looking to run lighter bullets just what I have on hand to get use to the rifle and will concentrate on a good 165gr-180gr load which I found worked best in the 300Bee I had.
A 180gr bullet is probably the best all around bullet weight in the big 300's from what I have experienced and read, like the 165gr is in the .308-30-06.

 

[SJB358]

Not really looking to run lighter bullets just what I have on hand to get use to the rifle and will concentrate on a good 165gr-180gr load which I found worked best in the 300Bee I had.
A 180gr bullet is probably the best all around bullet weight in the big 300's from what I have experienced and read, like the 165gr is in the .308-30-06.

It is hard to beat a 180-200 grain bullet in the big 300's. They seem to really thrive with FPS and energy with the heavier bullets. Honestly anything tough with a 165 on up is going to kill like crazy. I wished I had 165 BBC's, I'd run those without issue from my 300 Wby around 3300-3400 and watch stuff flop...

 

[truck driver]

Not really looking to run lighter bullets just what I have on hand to get use to the rifle and will concentrate on a good 165gr-180gr load which I found worked best in the 300Bee I had.
A 180gr bullet is probably the best all around bullet weight in the big 300's from what I have experienced and read, like the 165gr is in the .308-30-06.

It is hard to beat a 180-200 grain bullet in the big 300's. They seem to really thrive with FPS and energy with the heavier bullets. Honestly anything tough with a 165 on up is going to kill like crazy. I wished I had 165 BBC's, I'd run those without issue from my 300 Wby around 3300-3400 and watch stuff flop...

Once I get it sorted out I was thinking some 165gr mono bullets would be the trick and I could stretch them out in the 3.60" mag box. I may have to get it throated to take advantage of that, lots of extra room in the mag box now compared to the standard box.

 

[Darkhorse]

IMR4350 gives me the best accuracy in my Browning .300 Win. Mag. This is with 165 and 180 grain bullets.