300 WM reload data thoughts wanted

[WBest84]

Looking for some thoughts on this reload data I obtained over the weekend.

Rifle: Remington 300 WM 700 5R Gen2 with 24" barrel 1 in 10 twist. Shooting suppressed through a Silencerco Omega suppressor.

Bullet: Berger 210 VLD
Powder: H1000
Brass: Hornady
Primer: CCI 250 Magnum

I made up 6 loads: 3 shots of each
72gr H1000 .020" off the lands
74gr H1000 .020" off the lands
76gr H1000 .020" off the lands

72gr H1000 .050" off the lands
74gr H1000 .050" off the lands
76gr H1000 .050" off the lands

The goal was to find out what this rifle likes best for a long range hunting/target load so that I can order custom CDS dials for my Leupold scope. I'm a little concerned with the velocity results and wanted to see what some others thought.

72gr loads avg 2575 FPS w/ 4 stdev
74gr loads avg 2685 FPS w/ 22 stdev
76gr loads avg 2750 FPS w/ 17 stdev

Now my most accurate load was:
72gr H1000 .050" off the lands
2 shots in the same hole the third 1/2" away@ 100 yards. The .050" off the lands loads were better than the .020". The 74gr and 76gr loads weren't bad 1-1.5" spreads @100 yards.

From my online research I'm seeing many guys seeing excellent results with 76-78gr of H1000 with muzzle velocities in the 2800-2900 range.

I used a Caldwell chronograph about 10 feet from the muzzle.

Should I be concerned that my most accurate load is only in the 2575 range? None of the brass showed any signs of overpressure. No sticky bolts. Should I try some 77-78gr loads to see if those preform as good as the 72?

For comparison I shot 3 of last years hunting loads.
180gr Nosler accubond
70gr IMR 4350
Avg velocity 2933 FPS w/ 6 stdev
1" spread @100 yards

 

[BEEMAN]

Could try the 215 Berger. Easy to develop a load for. My 300 Win Mag took 15 shots to develop a load. Would of taken less but I started low and worked up. 30 thou off and H1000 is a great combo. I won't post how much H1000 as every gun is different. But I will say I get 3000 fps with this combo out of a 26" Brux. Drops confirmed out to 910 yds.

 

[Gord0]

Your charge weight increments are too big. You may have found a lower node with that 72gr load. I would run a ladder going up in .5gr increments looking for pressure to find your nodes.

 

[WBest84]

Your charge weight increments are too big. You may have found a lower node with that 72gr load. I would run a ladder going up in .5gr increments looking for pressure to find your nodes.

So there may be another node at say 75.5 grains that will get me more velocity and the same accuracy. I'll have to mess around with it some more. I guess is appears I have room to go above 76gr as well.

 

[Gord0]

So there may be another node at say 75.5 grains that will get me more velocity and the same accuracy. I'll have to mess around with it some more. I guess is appears I have room to go above 76gr as well.

It's all rifle dependant, but I know in my rifle I've found nodes to be just under 1.5gr wide. They're fairly accurate within that node but depending on where at in the node my ES drops. Then you can go back and do some fine tuning of your seating depth to see about shrinking ES and groups a little more. You may be coming into a node at 76, or coming out of one there. Best way to tell is to run a ladder.

 

[WBest84]

It's all rifle dependant, but I know in my rifle I've found nodes to be just under 1.5gr wide. They're fairly accurate within that node but depending on where at in the node my ES drops. Then you can go back and do some fine tuning of your seating depth to see about shrinking ES and groups a little more. You may be coming into a node at 76, or coming out of one there. Best way to tell is to run a ladder.

Ok ES is one thing I've seen posted but I don't know what that is short for. I was also unaware that there could be multiple velocity nodes. This was the first round of testing for the 210 Berger so I was really trying to see what velocities I was getting and worked up the the Berger recommended max load which was also noted to be conservative.

So my best bet may be to run a new ladder starting at 76.5 grains and working up to 78 or so. I'm guessing that's also going to be close to the max load I'll be able to run.

 

[dirthead1]

I just finished load workup on my 300 wm with 215 hybrids and H1000. I found a velocity node between 75.5 and 76.5 grains. So charges at 75.5, 76.0, and 76.5 had virtually the same average velocity. The 76.0 charge had the lowest ES (extreme spread) and SD (standard deviation). SD was right at 9.0, which I can live with for this load. Accuracy and POI was identical for all three loads. The 215 is a very easy bullet to load for. I haven't tried a 210 vld, but I would not be surprised if you found something similar with that bullet as well. Velocity is running 2945 fps out of my 26" barrel.

 

[odoylerules]

I have the exact same gun/barrel. I'm running a slab muzzle brake. I couldn't get the Nosler ABLR 210's to group no matter what I tried. The Berger 215's are flying phenomenally though. 75.0 grains of H-1000, 0.050 off the lands. 10 shot ragged hole at 100 yards, 2-3" vertical spread at 600 yards. 4-5" groups at 1000 yards. Velocity sucks though, 2785fps. I'm staying with it until this barrel dies.

 

[WBest84]

I have the exact same gun/barrel. I'm running a slab muzzle brake. I couldn't get the Nosler ABLR 210's to group no matter what I tried. The Berger 215's are flying phenomenally though. 75.0 grains of H-1000, 0.050 off the lands. 10 shot ragged hole at 100 yards, 2-3" vertical spread at 600 yards. 4-5" groups at 1000 yards. Velocity sucks though, 2785fps. I'm staying with it until this barrel dies.

Thanks for chiming in. I went with the 210s as I'm going to hunt with them but I guess there isn't much difference between them and the 215 though. I saw some other guys had issues with the Nosler 210s but haven't seen any with either the Berger 210 or 215. Looks like I need to run a little tighter ladder from 75 up and see what happens.