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Mar 25th, 2012
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300WM load data #6934187
10/26/17 10:39 AM
10/26/17 10:39 AM
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68A Offline OP
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Hornady doesn't list any data for 225 ELD match with H1000. Found some info on another forum of a guy running a ladder test from 70-79 gr (not sure how he had case capacity without compressed load) without pressure spikes until 79.5 gr. Any experience or advice here? Otherwise all I have to go off of is some internet data.

Re: 300WM load data [Re: 68A] #6934261
10/26/17 12:38 PM
10/26/17 12:38 PM
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Wolfe City, TX
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Here's what I do.

Look at my Speer manual.
Look at my Sierra manual.
Look at Hodgdon.com

Using a bullet of as close to the same weight as what I will be using, on all three sources. The highest listed high, is what I use. And I may go past that a bit.

If you get compressed powder on a .300 Win Mag, so what. I run 7 Rem Mags compressed with Retumbo.



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Re: 300WM load data [Re: 68A] #6934286
10/26/17 12:59 PM
10/26/17 12:59 PM
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Piggy back the data for the 220 grain bullets, and you will be good. 79 grains seems really WARM with a 225! I run Retumbo in mine, and I'm less than that powder charge weight, and H1000 is faster burning.



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Re: 300WM load data [Re: 68A] #6934293
10/26/17 01:11 PM
10/26/17 01:11 PM
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Also, it greatly depends on your seating depth and what brand of brass you are running. The max powder charge will vary greatly depending on those 2 factors.



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Re: 300WM load data [Re: 68A] #6934377
10/26/17 02:02 PM
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Thanks for the input.

Jason, thats exactly what I did as far as information sources.

I started at 73 and went up to 76 in .5 increments. Based on .020 off the lands, 76gr Im getting slight compression. COAL of 3.525. Running Nosler brass and CCI 250. I really wanna get 2800-2850 out of it. Should be able to push that a mile and still have some punch left at that distance.

Re: 300WM load data [Re: 68A] #6934396
10/26/17 02:16 PM
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That's fast! I'm running my 225 BTHP Hornady bullet at 2802 in a 29", tight bore (.298") barrel with a stiff load of Retumbo, Nolser brass, seated about 3.500+. I have taken it to a mile also, multiple times. It will do well for you.

A slight compression is fine, and normal. I don't know if you will reach the 2800 fps, if you are running a 26" barrel and H1000. I'm running 230 Berger's for customer rifles at 2700-2750, depending on the load and rifle. 2700 fps with a 230 Berger has been pushed over 2000 yards. It will work!



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Re: 300WM load data [Re: 68A] #6934415
10/26/17 02:28 PM
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Originally Posted By: 68A
Thanks for the input.

Jason, thats exactly what I did as far as information sources.

I started at 73 and went up to 76 in .5 increments. Based on .020 off the lands, 76gr Im getting slight compression. COAL of 3.525. Running Nosler brass and CCI 250. I really wanna get 2800-2850 out of it. Should be able to push that a mile and still have some punch left at that distance.


You know you can bring it to my range and develop a load, right?



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Re: 300WM load data [Re: ChadTRG42] #6934532
10/26/17 03:26 PM
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Originally Posted By: ChadTRG42
That's fast! I'm running my 225 BTHP Hornady bullet at 2802 in a 29", tight bore (.298") barrel with a stiff load of Retumbo, Nolser brass, seated about 3.500+. I have taken it to a mile also, multiple times. It will do well for you.

A slight compression is fine, and normal. I don't know if you will reach the 2800 fps, if you are running a 26" barrel and H1000. I'm running 230 Berger's for customer rifles at 2700-2750, depending on the load and rifle. 2700 fps with a 230 Berger has been pushed over 2000 yards. It will work!


I'm excited to get underway. Wishing I had your labradar. Gonna go scope out the magnetospeed today.

Re: 300WM load data [Re: FiremanJG] #6934536
10/26/17 03:30 PM
10/26/17 03:30 PM
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Originally Posted By: FiremanJG
Originally Posted By: 68A
Thanks for the input.

Jason, thats exactly what I did as far as information sources.

I started at 73 and went up to 76 in .5 increments. Based on .020 off the lands, 76gr Im getting slight compression. COAL of 3.525. Running Nosler brass and CCI 250. I really wanna get 2800-2850 out of it. Should be able to push that a mile and still have some punch left at that distance.


You know you can bring it to my range and develop a load, right?


Hell yes. Been meaning to text since I picked it up from Tony but with killing season coming up just been busy. Taking the son to the air show Saturday, not sure if you've got a class Sunday.

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