Alternative for 300 win to Retumbo

[Marble]

Originally Posted by sodak

The Hodgdon website lists 66.8gr as MAX with a Nosler E-tip. The IMR site lists 68.1 as MAX with the same bullet.

You should not use speer bullet data to make loads for nosler bullets.

Your loads are pretty warm.

After looking through my book, I found the following.

Nosler #6, page 403. IMR 4350 max 70.0 3130fps, 24" barrel. I'm shooting a barrel 2" longer with 1 grain more powder. I think my chronograph is probably pretty on. And yes it's a little warm. I was wrong, I thought I was below the max and I'm not.

[Lefty7mmstw]

Originally Posted by backwoods83

Lefty, Speer #14 list 72grns Imr4350 and 71grns H4350 under a 180 in 300wm, but I have yet to see charges even higher than that hit 3240 in 24-26" barrels. 7828 will do it with ease in a 28" pipe.

barnes, hogdgon, and nosler(the bullet in question) are lower. The only manuals I have that show hotter(and then only by a grain) are using a standard primer to light the fire.

[Lefty7mmstw]

Originally Posted by Marble

What is quickload?

a ballistics program some here use... given enough info it can predict yield pressures, charge weights, etc.. I don't use it but I HAVE used strain guages. They'll open your eyes a bit. My last 7stw was wearing a guage for a while and 75 Kpsi loads would eject just fine and didn't bind. I never pushed the rifle to the point where I got hard extraction while I had the guage on it, but I did switch from 7828 to rl25 as I was getting the same accuracy and velocity at ~10Kpsi less pressure(58Kpsi vs. 68-70Kpsi). I won't beat up my rifles for 50-100 fps; I'll get a bigger gun.

[tpichevy]

Subed for info.

[Marble]

Originally Posted by Lefty7mmstw

a ballistics program some here use... given enough info it can predict yield pressures, charge weights, etc.. I don't use it but I HAVE used strain guages. They'll open your eyes a bit. My last 7stw was wearing a guage for a while and 75 Kpsi loads would eject just fine and didn't bind. I never pushed the rifle to the point where I got hard extraction while I had the guage on it, but I did switch from 7828 to rl25 as I was getting the same accuracy and velocity at ~10Kpsi less pressure(58Kpsi vs. 68-70Kpsi). I won't beat up my rifles for 50-100 fps; I'll get a bigger gun.

Thanks for the info. At the pressure my gun is shooting at it ejects and functions normally. I wasnt trying for the velocity I got, I was loading for accuracy and it just happened to be the most accurate round. Then I chronographed it and was surprised.

[Lefty7mmstw]

Originally Posted by Marble

Thanks for the info. At the pressure my gun is shooting at it ejects and functions normally. I wasnt trying for the velocity I got, I was loading for accuracy and it just happened to be the most accurate round. Then I chronographed it and was surprised.

Not trying to be a party pooper man, just saying you are likely a bit warm. I'd rather see everyone running safe stuff out there. I'd back off to 3150 fps(whatever that lands for charge) and work your seating depth a bit to re-tune. Another way to look at your load is the number of firings you get before your brass goes. Your primer pockets should be good more than three firings with safe loads.

[jasent]

I just finished working up a great load with re25 & 185g. Berger's hunting vld. Shot a 3 shot at 200yards that was just under an inch wide. And all level. proChrono says 2943,2943,2949 with es 6 and sd of 3. These reloader powders have been great in my gun.26" tube
Re25-77.5g
Cci#250
.090" jump
Win brass