Gonna try out some 180 SST's IMR 4350 and Siroccos H4831 tomorrow and see how it does. I only have Weatherby brass.

Had really good accuracy with 200 partitions and IMR 4831. Heard about false shoulders for fire forming. Didn't really thoroughly get all the info on it. Only have RCBS FL die set. So just partially neck size to chamber with a stiff load and it should be good ? Please, only people who done it, reply.

Lots of ideas out there, but I have been shooting a 300 WBY for quite a few years. First of all, I would recommend full length resizing. Weatherby has higher chamber pressures than most standard cartridges will be loaded to and that will cause the brass to expand quite a bit.

I load 180 grain Nosler Ballistic Tips and get great accuracy with those bullets and IMR 7828 SSC powder with velocity near 3200 fps. You will probably find IMR 7828 the best accuracy and velocity in the 300 WBY.

Bonded and partitions aren’t necessary either, I have killed a bunch of elk with that combination and you will find Nosler will substantiate that…

Agreed.
if it is a weatherby use 7828 first

Always try 7828 first. Shrap suggests a great bullet too. That's what I started out loading in my 300WBY's. 84 grains usually did the trick quite nicely. However lately, I've tried the 175 LRX with 7828 and they shoot damn well.


H4831 is also a great powder to consider.

As far as sizing die setting. It's just like any other cartridge. PFL sizing with your RCBS die will work just fine. The 300WBY is not that finicky.

Best accuracy in our .300 Bees has been with 150 or 168 gr TTSX. The 200 gr NP also gave decent accuracy in our guns. 7828, yes, all day. F215 dogma notwithstanding, have done just as well with WLRMs.

Be aware Remington and WBY/Norma case capacities differ substantially. Comparing various data manuals should be enough to understand this. But never stuff a max charge safe in WBY brass into a Rem case.

Need to do the false shoulder drill is binary. You either need it, or you don't. If factory loads fired in your rifle end up with incipient separations above the belt after a couple firings - whether you FL, PFL, or neck size - you ought to consider doing the false shoulder drill. It is far more reliable and productive than the other technique: sticking the bullet hard into the lands. Good luck sticking a bullet in the lands of a WBY, anyway.

The false shoulder drill is very simple to perform. Have done so for multiple rifles, not all of them belted cases. On a .300 I just run virgin case necks over a .338" button, then back down just enough so chambering requires effort. After firing, can neck size several times before a slight shoulder bump is needed.

Same method here. 338 mandrel and then size to fit. Pretty easy deal.

My sons 300 gets a steady load of 7828 and 200 grain Noslers.

7828 going once, going twice………….

How is it temp sensitivity wise ?

One other thing...20 years ago a guy told me get a Weatherby and forget it. At the time I was just getting into shooting and hunting, and my father in law shot a group he covered with his thumb, that his Rem 722 .222 rem made. So from there I struggled through trying to make my 200 dollar rifles shoot. Did I have to buy a 1500 dollar Mark 5 ? No. I bought, back in '14, a Vanguard, 300 Weatherby, synthetic stock, two lug bolt that was too easy to load for. My Winchester M70 shoots well, but I can't seem to fire form that easy.

Question.. According to SAMMI the case head to datum on the cases for the 300 is 2.3857 + .008 ? = 2.394 base to datum fireformed or minimum HS ?

Don’t let the internet get to you. Most of what you read is irrelevant. I have hunted my entire life with all sorts of guns, modern and antique and never checked datum. As a matter of fact, I never even heard of datum.

Full length resize your brass, watch for the incipient case separation that was mentioned earlier and load up your 300 with 7828 and your favorite bullet. It will work and the weather won’t affect it enough that you or the elk will ever notice.

Before you go hunting, run all the ammunition through the action that you are taking with you to make sure you don’t have any tight cases that may interfere with the cycling of your action when you are shooting. The 300 WBY can stretch the case enought to make it hard to close the bolt even with the gun you first fired it in…

I've only used Weatherby factory ammo, but my .300Wby Vanguard loves 180grn TTSX's. And they do a number on cow elk.

as another LOONY here 300 Weatherby mag. is a great cartridge and i feel the only 3 actions i would have a 300 Weatherby mag. in is a Weatherby mark 5 , Ruger #1 , or a Winchester model 70 with the claw, in all 3 manufactured rifles.

Good post. I often see and read about temp sensitivity. My best suggestion is to work up your load in the fall/winter months. Around the same temps you intend to hunt. Absolutely no issues or concerns doing it this way. Most of us are not going to be hunting elk in the summer time. The LRX load I worked up for my 300wby rifle was worked up in late October (right before elk season). Temps were in the 30's:


Then after double checking poi and accuracy after replacing the stock:

Temp was in the 40's, so little to no difference in accuracy.


I tend to work up all my elk hunting loads in cold weather. The matching pre 64 338wm to my 300wby that shot those groups above:

Same thing. Never worried about my loads worked up with so called temp sensitive powders. I run a lot of IMR4350 in my 30-06's without worry as well. The obsession about whether it's "temp stable" or "temp sensitive" should be left to the varmint hunting rigs, not elk hunting rigs. Generally speaking..

what's this pre-64 model 70 rechambered from a 300 H&H or custom barrel?

One load with 7828 wasn't good.. 86 grains barnes 150 TTSX 1-1/4 inches at 100
Best groups were RL 25 and H4831. 82 of 4831 w/ 168 TTSX 3/4's at 100, 82 of 25 w/ 200 PT..1/2 inch at 100, 72 of IMR 4350 w/180 SST 1 inch at 100. Got rid of 25 and 7828 and H1000, I know.. why !?? Got mag pro thinking it would be better.

I say this much the hot loads, max charges are the best, no matter what powder. I guy I used to hand with said his buddy ran his barrel hot getting mad because it wouldn't group, .338 Win Mag. The hotter the barrel got the better it shot.

Ok so I'm ok with just FL sizing. What bullet shines with any powder you guys loaded with any powder ?

A Ballistic Tip or similar Hornady or Sierra can be pretty easy. Usually if a rifle won't shoot any of those for beans, something is messed up.

Forgot about the Nosler BT. Funny story about the same guy who knows another guy who's 06 would not shoot any factory ammo at all. Loaded a BT problem solved.

IMR 4350 is one of those temp powders. I don't usually load in the summer months anyway. My 06 and 270 like 4350.

Don’t get too caught up on groups. A 1 1/4 inch 100 yard group is 6 inches at 500 yards. Remember you aren’t shooting bench rest here, you are shooting elk. 6 inches may sound like a lot, but the truth is, you are still only 3 inches from point of aim and that should keep you in the kill zone of an elk.

You don’t need a 1/2 inch group to kill elk…

I don't need tight groups but it keeps me busy between seasons. Just like to see what the rifle is capable of that's all. I only hunt deer, no elk for me. I could do a lottery in PA but I can't justify paying for years just to kill an elk. Although there are some really nice ones up where I go.

7828 is the tits in the 270 Westherby mag also..mb

very good advice and trying to get a super load for a tight group with the recoil can be painful too .

At the bench I use a limb saver butt pad

the 300 Weatherby mag. is a great hunting cartridge but to continue shooting this cartridge off the bench gets old no matter what pad you put on your shoulder. i know many guys always want me to sight in their 300 which i used too but now days i pass.

I'm just getting ready to reload for the 300WBY. A dumb question but are you guys talking IMR 7828SSC?

Either that or plain old 7828 has worked fine for me.

When I used to load for my 300 Wby. it was IMR7828 in the rectangular metal can.

That is SSC which stands for Super Short Cut. IMR-7828 is a long grain extruded powder, and the SSC is easier to get through a powder measure and probably causes less space issues in a cartridge case to allow more consistent powder charges.

It is a great, large capacity powder for magnum cartridges…

Bsa1917hunter

I often see and read about temp sensitivity. My best suggestion is to work up your load in the fall/winter months. Around the same temps you intend to hunt. Absolutely no issues or concerns doing it this way.

I rather go that route where I hunt, I hunted years of fluky weather and was really mild, it warmed up considerably during the day,

Rechambered from 300H&H. It was pretty common back in the day.


Bottom rifle in this pic. These 2 weigh in at 8 pounds even as shown. 338wm has a custom barrel on it. At one time, it was also an H&H.

I generally just use the regular ol 7828.

anothergun, the 300WBY has elk written all over it!!! The cartridge itself was one of Roy's ultimate designs, as far as I'm concerned. It's the cartridge that forced me into handloading though. Couldn't afford to shoot the rifle I bought because factory ammo was so damn expensive. Learning real quick why I got such a great deal on the rifle at the time!! I burned the barrel out on that sporterized m1917, and used Nosler 180gr ballistic tips to do it too. 84 grains of 7828 was the sweet spot.

Now, shrap is right. These are not benchrest guns. However, most of mine have shot less than 1" off the bench, some closer to 1/2", or off a pack. My spare 300WBY shoots like this:

Lighter bullet using H4831 powder^^ This is a nice shooting load. Mild if you want to call it that.

One thing shrap hits the nail on the head about is your POI/POA. IF you can keep your bullets 3" from POA at 500 yards, that is another question all together. With his example of a 1 1/4" group, that is no guarantee that those bullets are going to even be a 6" group or be 3" from where you are aiming. Especially in the wind. That largely depends on how your rifle is set up, if you have it zeroed properly, and whether you can use it that well. I've seen it so many times at the local range, that I can't even count. Generally guys shooting 300wm, 338 lapua magnums and the like. Some can't even consistently keep their shots on my favorite steel coyote at 400 yards. Let's put it this way: I'd not take them deer or elk hunting with me.

I remember last year, shooting my spare 300wby and doing a side by side comparison with a measly AR15 I have. Set up some targets at 400 yards, and was appalled by how I shot with the magnum. Generally shooting standard cartridges better, I'll admit.

You'll notice, both rifles are scoped the same^^

300wby:


Measly AR15. Rogue Defense with old Bushmaster HBAR:


That's another 7 pound Winchester model 70 of mine.

The group is not great, but any of those bullets (from the 300wby) would have made elk steaks that day..


Also, as a side note to the 175 LRX load I worked up in my pre 64 model 70, I also shoot it in the newer XTR in the pacific research stock (shown above). In that rifle, it shoots 1 moa out to 400 yards:


So to answer the OP's question about magic bullets and powder. That load is proven in both of my 300WBY rifles. I wanted to try that LRX out on an elk, but did not get the chance to. Last day of the hunt I was packing my Tikka T3x 7mm-08 and shot a spike bull with a 140gr TTSX, as luck would have it!!!

looks like they did a really good job cuz it's shooting pretty dang good..

Thanks. I don't know who did the work. The guy I bought it from said he bought it that way and he had it for 20 years. He said he was waiting for just the right person to sell it to. Made me one hell of a good deal on it. Last year I restocked it in the Brown Precision PoundR kevlar stock. She's a shooter. I don't shoot either of these rifles much because I want to conserve the barrel life.

BSA1917

I was always under the impression the tighter at 100 the better, and spreads out father down range. Even with a tight group under an inch, spreads like your 400 yard group ? I shot tight groups with the .270 WCF and it only open to inch or inch and a quarter at 300.

I still have a small amount of old 7828 in a metal can. IMR/hodgdon discontinued old 7828 in 2018

There are all sorts of experts that make claims of what a rifle and bullets will always do. The more I see of these claims, the less I believe them. Guys like Bryan Litz make assertions that become gospel, yet I have personally witnessed results that don’t follow his narrative.

Almost everyone will calculate a group by multiplying the group size at 100 yards by how many yards past 100. That may be mostly true, but I have guns and have seen others that don’t necessarily follow that model. That is, I have seen guns that were around 1 inch at 100 yards and shoot better than the cone theory , and actually shoot better at distance.

I know it’s not fashionable to argue the industry standards, but I don’t care and continue to shoot better than some of the cone concept of bullet performance…

I always shoot for the best 100 yard groups, then test at 400 yards. Since I can set up targets at 400 at my range. I can shoot steel out to 1,000 yards at our local range, but not set up paper there. I have other spots I can do that though. In general, most times it works out the way you say, but not always. That is why it is important to test your ammo out to the range you intend to hunt. It's not always a guarantee, that you best shooting ammo at 100 yards will be your best shooting ammo at 400 yards. That's not even taking conditions into the equation. We all know what winds can do to a group.

Your 270 statement is also valid. I've seen some weird stuff like that when shooting my 270's. It could be human error, luck, or some other phenomenon going on as well..

I can go along with that... and article I just read about a guy who tests loads at 400 yards, so yeah, I get that.

I can only test at 200 after 100 yard test. No wind helps and watching a flag helps too. When I hunt at longer distances I watch the wind, and I made some shots that I couldn't believe, and said to myself, that is exactly where my cross hairs were.

some people argue that with bullets stabilizing better they will shoot better at distance and close I don't know that I've ever bought into that entirely. but sometimes I'm going to say many times if you're shooting better at distance than close up it's probably a parallax issue

Barrels are like tires buddy! Shoot em up. Can’t do it when you’re dead!

Not likely mate

Too bad they weren't like puzzy. Cant wear that out, no matter how hard you try.. and I try buddy!!! I have a lot of rifles, so I choose which ones don't get shot much. That 338wm is one of them. The funny thing about that rifle is it has a ton of barrel life. I can't think of anytime It's shot over 3/4" for 5 shots!! I've always been a little leery about putting too many rounds down the 300wby's as well, since I wore the first one out. Plus, they take a lot of powder to feed.

300 Wby
180 Ballistic Tip
84.5 gr IMR 7828
3200 fps
1/2 moa


Has been my old faithful load since 1998.

For sure. Same here, but I when I do get on to shooting them, I make em hot. I'll let the next fella baby em..

guess I'll check on Nosler proshop and see what they got.

Can't find BT's in stock. Funny though Weatherby loads Norma and Hornady. I have 2 full boxes of SST's and a box of 178 ELD-X. Berger 175 VLD Hunting, 180 Speer hot cores, 180 Sierra GK's, 180 TTSX's, 180 Swift Scirroco's, Ye old 180 Winchester silver tips.

Found two boxes of 180 accubonds on GB

If it were me, I’d pick 3 and see what the gun says.

You’ve got some good choices. If you’re running them into meat the ELD and SSTs may be rough.

ha ha...

SST no doubt, Maybe the TTSX might eliminate meat damage. Sources say the heavier bullets have thicker jackets, thicker jackets slower expansion even at higher velocities.

My 7828 loadings didn't group like I wanted. Tried RE26 in mine and it shoots small groups.

Scheels also has ABs.

https://www.scheels.com/p/nosler-accubond-bullets/3034-53742.html?cgid=rifle-bullets#start=2

Got Mag pro, Retumbo and W-780 supreme, we'll see.

Hilariously and without doubt,SchitSmell and BullSchitArtist are THE Dumbest Of Fhuqks and CLUELESS beyond refute...the "lucky" kchunts. Hint. Congratulations?!?





Bless their poor poor(literally) hearts.

Hint.

Fhuqking LAUGHING!...............

MK V Deluxe 300 BEE

NICE !!!