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Discussion Starter #1
After extrapolating data from Hodgdon's site, I have a pretty good idea i'll end up around 65- 70 gr of the 4831SC, and 70-75 gr of the H1000.
The powder(s) I'm interested in is primarily H4831SC, because I already use that in my 200gr ELD-X hunting load, but I may also be interested in H1000.

Just looking to experiment with the heavier bullets for long range, especially with a .777 BC .
So, anyone else going down this road already and willing to share?
 

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I am working on my first reload of all time. I am using H1000 with the 225 match myself. I will not be able to test it out for a couple weeks and also I've not reloaded before so I might not have good info to give back.
 

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Discussion Starter #5
Well, go slow and careful, and if you find a load that puts them all in the same hole, I'd be interested in hearing all about it!

What rifle you shooting?
 

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Info Is on the bottom of my post
 

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I saw this post.
Since the Hornady ELD bullets are relatively new, and there isn't much load data for 225 gr bullets in .300 win mag, I thought I would share todays test results .

My rifle is a .300 win mag with a 28" Shilen barrel #8 1:10 twist(heavy bull barrel), 1lb Timney trigger, comp recoil lug, AICS magazine fed, Aluminum piller bedded.

Virgin Norma brass
CCI - 250 Primers
H1000 powder
Hornady 225 gr ELD bullets.

As per Hornady's recommendation, I seated them 0.020 off the lands. This gave me a COAL of 3.6220. The Hornady manual has a recommended OAL of the standard 3.340 .300wm length but on the phone Hornady's rep recommend a 0.020 jump so that's where I started.
This is a long bullet, 1.655 with a .175 polymer tip. Using the Miller twist rule for poly tip bullets, this bullet will stabilize in a 1:10 twist barrel and a 1:10 is the twist Hornady tested it in. The bearing surface is 0.5865. with where I have it seated, there was about 0.423" of bullet down in the case...The boattail length is 0.1865.

Temp today was 72 degrees with a 5mph left to right breeze. I tested at 200 yards. This test was mainly a pressure test but I shot over my Alpha Chroney and I fired 3 shot groups at each charge weight.

70 gr.
2630 fps avg, 60 fps es group .75"

70.5 gr
2675 fps avg, 20 fps ES, group 1"

71 gr
2694 fps avg, es 26 fps, group 1.1"

71.5 gr
2720 fps avg, es 70 fps, group 1.8"

72 gr
2730 fps, ES 36 fps, group 2"

72.5 gr
2739fps, ES 90 fps, group 2.25"

73 gr
2745 fps, ES 5 fps, group 1.3"

73.5 gr
2767 fps, ES 43 fps, group 1"

74 gr
2771 fps, ES 18 fps, group 1.25"

74.5 gr
2801 fps, es 46 fps, group 2"

75 gr,
2829 fps, es 41 fps, group 1.5"

75.5 gr
2851 fps, es 24 fps, group 1"

76 gr
2871 fps, es 12 fps, group 1/2"

That is all I loaded. There were no signs of pressure at 76 gr or below. I will try 76.5 and continue on up until pressure forces me to stop. Also, the POI flattened out from 75-76 gr. 2850 - 2900 fps may be the sweet spot.

I will update this thread as I continue to work this load up
 

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I hadn't just updated this thread in a while but for the guy building the .300wm, I will finish it out.

I went up to 79.5 graines. I was able to go that high because I use NORMA brass Which holds 8 more graines of water than Remington and 4 more than SAAMI. Also I seated them long.

I'll fast forward to the end.

79 grains gives 2900-2910 fps and 79.5 gives about 2925.
2950 is the max I can get according to QL and believable based on what I found.

My best groups occurred with 79 gr, H1000,... Seated .020 off the lands... Groups at 1/2" or less at 200 yards every single time. In fact I get those groups from 78-79 gr as that charge keeps me between 2850 fps and 2900.

Be advised, this is over max for most brands of brass. But in my rifle it isn't over max (according to Quickload and evaluation of my own extraction and brass).

Also be advised, pressure begins to spike quickly once you hit 2900 fps.

Another note is that beyond about 2915 fps or 79.5 gr of powder, my groups began to open back up. 79.5 was about 1.25" at 200 yards and 79.7 was about 1.5".

I believe 80 gr would get me 2950 but that would be a Max pressure load and I doubt it would group well.

I'm not going to mess with the seating depth because 2900 fps and 1/4 moa is outstanding, plus if I seat any longer I will have to modify the feed ramp again to get the rounds to clear it and still feed from the magazine.
 
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That is a load to keep , that's a mile maker right there.
I am working on a 7.62x51 with a ELD MATCH 208 gn.
 

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Discussion Starter #10
Thank you for sharing your load data themannurse!!

Been a while since I checked back in on this thread. Had some problems with my 300 wm LR, which kind of sidelined the reloading of the 225gr eldx. Ill be sure to revisit this when the gun comes back from the gunsmith.
I hope my efforts go as well as yours!

Take care and sorry for the delayed thank you.
 

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FYI i jumped ship on the 225 for the fact I was losing to much after 1000 yards. My barrel twist is only 1:10 so thinking thats the problem. I'll still use them until I get the Berger 200 20x dialed in. still shoots OK after I adjusted the BC down to .330 to match the round impacts. Another reason I was finding the tips after I took the bullet apart would dent making it not usable.
 

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I saw this post.
Since the Hornady ELD bullets are relatively new, and there isn't much load data for 225 gr bullets in .300 win mag, I thought I would share todays test results .

My rifle is a .300 win mag with a 28" Shilen barrel #8 1:10 twist(heavy bull barrel), 1lb Timney trigger, comp recoil lug, AICS magazine fed, Aluminum piller bedded.

Virgin Norma brass
CCI - 250 Primers
H1000 powder
Hornady 225 gr ELD bullets.

As per Hornady's recommendation, I seated them 0.020 off the lands. This gave me a COAL of 3.6220. The Hornady manual has a recommended OAL of the standard 3.340 .300wm length but on the phone Hornady's rep recommend a 0.020 jump so that's where I started.
This is a long bullet, 1.655 with a .175 polymer tip. Using the Miller twist rule for poly tip bullets, this bullet will stabilize in a 1:10 twist barrel and a 1:10 is the twist Hornady tested it in. The bearing surface is 0.5865. with where I have it seated, there was about 0.423" of bullet down in the case...The boattail length is 0.1865.

Temp today was 72 degrees with a 5mph left to right breeze. I tested at 200 yards. This test was mainly a pressure test but I shot over my Alpha Chroney and I fired 3 shot groups at each charge weight.

70 gr.
2630 fps avg, 60 fps es group .75"

70.5 gr
2675 fps avg, 20 fps ES, group 1"

71 gr
2694 fps avg, es 26 fps, group 1.1"

71.5 gr
2720 fps avg, es 70 fps, group 1.8"

72 gr
2730 fps, ES 36 fps, group 2"

72.5 gr
2739fps, ES 90 fps, group 2.25"

73 gr
2745 fps, ES 5 fps, group 1.3"

73.5 gr
2767 fps, ES 43 fps, group 1"

74 gr
2771 fps, ES 18 fps, group 1.25"

74.5 gr
2801 fps, es 46 fps, group 2"

75 gr,
2829 fps, es 41 fps, group 1.5"

75.5 gr
2851 fps, es 24 fps, group 1"

76 gr
2871 fps, es 12 fps, group 1/2"

That is all I loaded. There were no signs of pressure at 76 gr or below. I will try 76.5 and continue on up until pressure forces me to stop. Also, the POI flattened out from 75-76 gr. 2850 - 2900 fps may be the sweet spot.

I will update this thread as I continue to work this load up

This was a very interesting read and job well done. Would you happen to have done the same to the Hornady 200 gr ELD-X since that is the heaviest bullet I ever intend to shoot out of my 300 WIN Mag or my 308 Winchester. Please post if you have. I have no intension of doing all that you have and will be loading to factory COAL with 76 gr of H1000 looking for 2,850 FPS . Please help if you can. Thanks
 
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