Home Forums Reloading Big Game Rifles No performance from superformance in 300wsm

i personal have drifted away from anything hornady says or does. ive heard alot of really good things about rl17 and 19. have you tryed those?

It's only a 300 WSM...it only has so much powder capacity and no matter what miracle powder it gets fed, it's only going to go so fast....3100 or thereabouts is about "it" with a 300 WSM and 165-168 gr bullets. That's what you're getting.....be happy.

It does not matter if we are talking 300 Savage,308 Winchester, 300WSM or any other cartridge. If the MFG advertises 200fps more velocity under the maximum pressure for that cartrdige, the powder should provide 75% of the increase or better; otherwise, it was pure marketing BS and false advertisement.

Maybe they did reach the advertised velocity for the test barre/rifle, but the powder is mass marketed so one instance is not sufficient to make the claim.

Using a cartridge with more capacity is NOT relevant so why bring it up?

It's only a 300 WSM...it only has so much powder capacity and no matter what miracle powder it gets fed, it's only going to go so fast....3100 or thereabouts is about "it" with a 300 WSM and 165-168 gr bullets. That's what you're getting.....be happy.

IME "super" powders seem to give higher velocities in incremental bumps;not quantum leaps.At least not in hunting rifles and at safe pressures.

You might bump into some combo's that give another 50 fps or so,or some load data in a pressure barrel under controlled conditions,but I'd expect that would be more the exception than the rule.

If a guy wants materially more than those velocities from a 300 magnum and 165's,he should look at a case with more capacity.There are no free lunches.Case capacity rules about every time.

Why bring it up? To illustrate the point that if you want to make a 300 WSM into a 300 Weatherby, the miracle powder won't do it....that's why I bring it up....and if you think it will, because some manufacturer says it will, then you are exactly the kind of person they want to sell it to....clearly, here, the miracle powder did not reach the 75% standard you mention. And if you want the extra velocity,the best way to get it is with a case having more capacity.That's why I brought it up..

Because (clue)there will be so much variance between their test barrels, and your hunting rifles across the board, that if you do get what they advertise, it's more a matter of luck than anything else.

And you will bump into many such examples like Freddy had, where pressure signs are reached way before the "promised" velocity increase is reached.

If 3100 from a 165 in a 300 WSM is pretty "standard",and you believe the miracle powder will give you 3300,safely,you also believe in the Easter Bunny.

I have worked with lots of miracle powders over the years, starting with the old Norma and H205's....the reason I don't fall into a swoon over any of them is that most of the "gains" came at the expense of over the top pressure,and the promised velocity gains were hardly ever seen.

Incremental gains? Yes....or reaching standard velocities with a bit less pressure?Yes.

But quantum leaps of 200 fps? Uhhh No....never.

You haven't done much handloading have you?

165 GR. NOS PART 72.0 3273 63,500 PSI

74.0 3410 63,500 PSI

that if you do get what they advertise, it's more a matter of luck than anything else.

Thanks for the insight into what the manufacturers are doing.