Home Forums Reloading Big Game Rifles Good .300 Winchester Magnum Loads

Hi Jwall,
What projectile is the ABT?
I am trying to pick a few loads to start with.
Thinking 4350 gives me a few options.
Thanks

Anyone try R16 with the 150s? I am working on loading the equivalent of Kenny Jarret's 300 culling load. He used Nosler BT but I have a couple of bags of 150 AB blems I want to try.

In the past I always shot 180 grain bullets usually with R22 but will switch to R23 and 26 next round of load work ups.

165 Barnes TTSX 0.010” off contact with the lands

72.0 IMR 4831

Fed 210 primer

Winchester brass

3080 fps from a 1:10” Montana Rifle Company

Bullet: Hornady 212 ELDX

Powder:AA 4350 65.5gr

Primer: WLRM

Case: WIN or PPU

COAL: 3.475

Group size 100yds .425 MOA (6 shots)

MV Ave: 2755 FPS

Elevation: 750 Ft ABSL

Temperature 55 degrees F.

In the half dozen .300 Win Mags I’ve tried it, 68 grains of IMR-4350 with the 180 grain Sierra Gameking or Nosler bullets all shoot well!

My favorite load with Reloader 19 is 71 gr with a 165 gr Nosler Ballistic Tip. 26" barrel

In the process of working up some loads.
I scrounged around to get some QL data for a range of .300WM projectiles and a range of slower powders. This is for a 24" barrel except for one projectile at the heavy/slow end (left side)

These are second table (max/near max) data so don't load without a workup.

I found it interesting that it confirms why loading manuals say not to pick an adjacent burn rate powder if you can't get the one you developed your load for.

The "projectile load fronts are pretty saw-toothed for the data I populated.

Note that if you have QL data for the IMR-H4350 window where I have a data gap I would love to fill the hole.

I also ran up some nodes based on Chris Long And Dan Newberry's optimum barrel time theory. The node error bars are +/- 0.01'S and bases on a 24" barrel.

I recently inherited my dads ruger #1 B In 300 WM. With 26” barrel .
I’d like to develop/shoot some heavier loads with it, 190-210 grain bullets, that are some what affordable and can be used on game. But paper mostly. Think Sierra game King.
I like Ram shot powder In my other rifles (big game /hunter/tac) as it meters like water.
I don’t have dies, powder, primers or bullets. While I know it’s bad time, I’m starting to look and research some stuff.
Thanks

Check the classifieds.
I think i saw some dies recently.

Seems unavailable with a Google search: July 2015 Handloader.

I will try the publisher

I just got ten lbs of H 4350. I want to try it with the 168 TTSX bullets. Trying to save my Reloader 22

I would like to see this article, if you can get it, or find it.

A left wing anti gun Canadian communist offering advice on reloading now?

I shot that same load for years with a 180gr Sierra boat tail. After that I went to H-1000

New to reloading I have 300 win mag model 70. Have purchased some 180 gr GMX to load working on Seating and have found that at .134 jump is as close as I can get that will still run through when load the three in rifle. My concern is that the end of bullet is quite a ways below the shoulder of case and not clear on if ok or definitely not ok any input appreciated.

If they shoot there I wouldn't worry too much about.

I used to burn a lot of AR 2209 which is H 4350 in my .300 Winchesters and worked up to 68gn which generated 3138fps in my 24" barrels.

75 gr of RL 22 with a 168 TSX -- not max velocity, but very accurate and consistent.

BOTH- One end kills--the other end cripples!

This is about where we are starting with my boys 300. Bottom of the old Sierra load manual..