300 WSM reloading

[brentc]

Good, but not good enough for the price they want for it lately. As far as the 300 wsm, you can use most of the normal mag powders, but you only have the same case capacity as the 300 h&h, so slower than rl22 or h4831 won't be at full pressure.

As to rl powders not being good at long range because of a supposed sacrilegious temp. sensitivity, all I can say is I've almost always got the best speed, accuracy, and uniformity with reloader. And it real world testing, the variance between high and low is usually less than hodgdon. Rl22 is all I shoot in my 300win browning a-bolt lh stainless stalker. I've got around 2 kegs just for that rifle.

7828ssc is slower than both H4831 an RL22 and is most definitely capable of full pressure in the 300 WSM.

 

[Lefty7mmstw]

7828ssc is slower than both H4831 an RL22 and is most definitely capable of full pressure in the 300 WSM.

I'm talking about overbore 50 bmg type powders and 25, retumbo, etc. And 7828(I don't use ssc) and H4831 are to close in burning rate to care the difference.

 

[brentc]

I'm talking about overbore 50 bmg type powders and 25, retumbo, etc. And 7828(I don't use ssc) and H4831 are to close in burning rate to care the difference.

Better check the burn rate chart. http://www.hodgdon.com/burn-rate.html

7828ssc is actually closer to RL25 and H1000. In a side by side comparison with 210 Bergers loaded to max pressure in my 300 WSM with H4831sc and 7828ssc, the H4831sc max charge is 65.5 and the max 7828ssc charge is 67.5 and the 7828ssc load produces 50-75 more fps. Both powders are plenty capable, but in the 300 WSM the H4831sc is at its best with bullets in the 180-190 grain range. For the 200-230 grainers in the 300 WSM the slower burning 7828ssc is a solid step up in performance.

 

[Timber338]

In a side by side comparison with 210 Bergers loaded to max pressure in my 300 WSM with H4831sc and 7828ssc, the H4831sc max charge is 65.5 and the max 7828ssc charge is 67.5 and the 7828ssc load produces 50-75 more fps.

Curious as to what kind of velocities you're getting out of the wsm with the 210 Bergers? Do they start off with enough velocity to carry enough fps out to your max range? Does Berger provide any info on what their functional velocity is, or anybody here done any tests?

 

[brentc]

Curious as to what kind of velocities you're getting out of the wsm with the 210 Bergers? Do they start off with enough velocity to carry enough fps out to your max range? Does Berger provide any info on what their functional velocity is, or anybody here done any tests?

I push the 210s at 2850 fps and I can safely push the 230s at 2710 fps out of my 24" bbl. The 210s and the 230s both maintain 1800 fps to 950 yards at my hunting elevation with the MV mentioned. The 230s carry about 200 ft/lbs more energy than the 210 at that distance.

 

[Lefty7mmstw]

Better check the burn rate chart. Burn Rate

7828ssc is actually closer to RL25 and H1000. In a side by side comparison with 210 Bergers loaded to max pressure in my 300 WSM with H4831sc and 7828ssc, the H4831sc max charge is 65.5 and the max 7828ssc charge is 67.5 and the 7828ssc load produces 50-75 more fps. Both powders are plenty capable, but in the 300 WSM the H4831sc is at its best with bullets in the 180-190 grain range. For the 200-230 grainers in the 300 WSM the slower burning 7828ssc is a solid step up in performance.

I really don't care as I've gotten away from both after I saw how high you have to run the pressure on crappy single base powders to equal double base velocity wise. I can scan in some graphs from my last 7stw if I can find them. I got rid of the rifle and purged the data pretty well so they may be gone. On my 7stw 7828 and rl22 took the same charge weight to make the same speed on a 140.
I really don't get your quibble as I wasn't arguing about whether 7828 is a suitable powder, only that you shouldn't get much slower than that in a little cartridge like the 300 wsm. For cripes sakes, my dad has one in a pistol.

 

[startrek1761d]

You're probably best off using a bullet that is less sensitive to jumping to the lands. I had a browning Stainless stalker that shot great, the limiting factor was the short magazine.

Mine shot the best with Hornady 165 to 180 grainers with RL17 and H4350. 65.5 grains of H4350 with a CCI250 and a 180 SST in Win brass at OAL 2.855 this was a one hole load at 2950 fps with my Abolt. BTW H4350 worked with every bullet I tried in my Browning.

I believe you're on the right track with the powders you're using. The only thing I would say is concentrate a little more on finding a seating depth before you get too experimental with powder. You're going to be jumping a good bit. My method was to find the sweet spot for powder and then tune the seating depth in from magazine length in .020 increments to 2.800. I always found a load in there that worked.

Another good load for me was 168 Nosler Etip on top of 67-67.5 grains of RL17. this should get you to around 3200 fps with good accuracy once you find a seating depth. Mine liked 2.820 with the Etip in this load combo.

I had heard the WSM calibers did away with the throat for less jump to the riling.

 

[Lefty7mmstw]

Well, I found a few of the pressure graphs. Can't input 'em with the scanner not on the computer yet, but in the 7stw with a 140 sierra, 78 Imr 7828 made 3375 fps at 63218 psi peak with a 6019 psi ex., 81 rl25 made 3360 fps at 59355 psi peak with an ex of 1784 psi. Both beat the Win 150 gr. factory; I did that one a couple of times with peak pressures of 71,181 and 69,739 and ex's of 2069 and 1504(all in psi). This was a 26" sendero sf.

 

[Timber338]

I push the 210s at 2850 fps and I can safely push the 230s at 2710 fps out of my 24" bbl. The 210s and the 230s both maintain 1800 fps to 950 yards at my hunting elevation with the MV mentioned. The 230s carry about 200 ft/lbs more energy than the 210 at that distance.

So it would probably be safe to say that the 300wm with a 26" barrel would be somewhere in the mid 2900's with the 210...

Crap. I'll have to give them a try.

 

[Lefty7mmstw]

I push the 210s at 2850 fps and I can safely push the 230s at 2710 fps out of my 24" bbl. The 210s and the 230s both maintain 1800 fps to 950 yards at my hunting elevation with the MV mentioned. The 230s carry about 200 ft/lbs more energy than the 210 at that distance.

That's pretty hot speed wise for the wsm. Stronger than the win 300wsm my dad had- that one didn't care what it ate, it was more of an '06 than a 300 mag.
I haven't passed 3k yet (right there though) on the 300 u with the 225 hornady. I have only used rl50 though, and it's dang bulky. I don't think I'll max out 'till rl33 comes out.
I get 2800 fps out of my 300 win with older 7828 loads with the 220 smk. I've pushed it more, but it likes where it is. My brother is only at 3K with a 180 in his H&H.

 

[Lefty7mmstw]

Better check the burn rate chart. Burn Rate

7828ssc is actually closer to RL25 and H1000. In a side by side comparison with 210 Bergers loaded to max pressure in my 300 WSM with H4831sc and 7828ssc, the H4831sc max charge is 65.5 and the max 7828ssc charge is 67.5 and the 7828ssc load produces 50-75 more fps. Both powders are plenty capable, but in the 300 WSM the H4831sc is at its best with bullets in the 180-190 grain range. For the 200-230 grainers in the 300 WSM the slower burning 7828ssc is a solid step up in performance.

About midway between the two in most cal's I shoot. I wasn't talking exactly, but ballpark, btw. I've gotten away from single base in the bigger rifles I own if I can because they seem to take more pressure and/or heavier charges to do the same work.
Btw Brenttc, what is your rifle's make.... I didn't catch it. The 300wsm rifle I worked with some years ago was a win coyote light made shortly before New Haven closed, and it was a better crow bar than rifle. I've got a crappy taste in my mouth from that one, and I think another make might fix that.

 

[brentc]

So it would probably be safe to say that the 300wm with a 26" barrel would be somewhere in the mid 2900's with the 210...

Crap. I'll have to give them a try.

Yes, mid 2900 is common with a 26" barreled 300 WM.

About midway between the two in most cal's I shoot. I wasn't talking exactly, but ballpark, btw. I've gotten away from single base in the bigger rifles I own if I can because they seem to take more pressure and/or heavier charges to do the same work.
Btw Brenttc, what is your rifle's make.... I didn't catch it. The 300wsm rifle I worked with some years ago was a win coyote light made shortly before New Haven closed, and it was a better crow bar than rifle. I've got a crappy taste in my mouth from that one, and I think another make might fix that.

Lefty, I'm not intending to be argumentative here. I'm just pointing out facts that support my experience. I've been around the block several times with the 300 WSM with multiple rifles and I've experimented with several different component combinations. I suppose I may have a little emotional investment with this one. My apologies.

My current 300 WSM is an FN built Winchester M70 Extreme Weather. I prefer the Win WSM action mainly because it is slightly longer than a standard short action, which allows me to seat bullets to the lands and maintain magazine function. I can load to an OAL 3.010 and still feed from the magazine. This is a great advantage now that I've converted to nothing but heavies. A previous Browning would only allow 2.865 and was nowhere near the lands.

 

[Lefty7mmstw]

Yes, mid 2900 is common with a 26" barreled 300 WM.

As for the WSM. Lefty, I'm not intending to be argumentative here. I'm just pointing out facts that support my experience. I've been around the block several times with the 300 WSM with multiple rifles and I've experimented with several different component combinations. I suppose I may have a little emotional investment with this one. My apologies.

No man, I apologize. I got a bit pushy on something of little real merit. I am actually very interested in the wsm's for my wife and kids in a few years. I've invested in the long action stuff before the wsm's, and the only non-pistol short action I have is a wssm(25). I have not had much experience with good ones, both 270 wsm's we had were flaky, and the aforementioned Win in 300 wasn't any better. I kinda got the h**l out after a couple of bad ones.

 

[Bart B]

I'd bet that if 20 people were given the same rifle to develop a load for a given bullet, there would be 20 different "best" loads for accuracy but only 2 or 3 for fastest muzzle velocity.