300 WSM Nosler Accubond 200 gr and H1000 - Need advice!!

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338x

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I'm getting some tests loads for my new 300 WSM rifle project and today I started reloading 200 gr. Nosler Accubond. I loaded 65 gr. of H4831SC and then switched to H1000. The data from Hodgdon for H1000 for a 200 gr. calls for 70 gr. as MIN and 72 gr. as MAX. & 72 gr. being a compressed charged (not much range here!). I went for mid point at 71 gr. and the case is filled quite a bit! I started seating the bullet and I felt some massive compression!! I'm also having a hard time reaching the COAL of 2.860"; maybe too much pressure??? Although Hodgdon NOR Nosler list the combination of the 200 gr. Accubond and H1000, Hodgdon still list the H1000 as a powder choice for a 200 gr. bullet. I'm looking for you guys out there that had the same experience... I might decide to stay with faster powders that use ~62-65 gr. Using a 24" barrel.

Cheers!
 
Nosler does not even list H1000 as an option.
Something in the neighbourhood of 4350 and 4831 are more in line at 97% and 100% capacity respectively.
IMR7828 was the most accurate powder tested and at 68 grain it is a compressed load at 106%.
From the Sierra manual:
Accuracy Load: RE-19/ 65.7grs. 2800fps/ 3482ft. lbs.
Hunting Load: Viht N560/ 68.9grs. 2850fps/ 3608ft. lbs.
 
grizzly416 said:
the short mag has trouble when it comes to pushing heavy long bullets
Click to expand...

This!! The WSM case is ideally suited for bullets not heavier than 180 grains.
It truly shines with monometal bullets of 150 - 168 grains.
The 200 AB is long, and displaces room for powder in the short case.
Regards, Eagleye.
 
horseman2 said:
Nosler does not even list H1000 as an option.
Something in the neighbourhood of 4350 and 4831 are more in line at 97% and 100% capacity respectively.
IMR7828 was the most accurate powder tested and at 68 grain it is a compressed load at 106%.
From the Sierra manual:
Accuracy Load: RE-19/ 65.7grs. 2800fps/ 3482ft. lbs.
Hunting Load: Viht N560/ 68.9grs. 2850fps/ 3608ft. lbs.
Click to expand...
That may sound like a stupid question but if Nosler did not list H1000 does that mean it's unsafe? Like i wrote Hodgdon list H1000 with 200 gr. SFT SP, I just substituted the bullet for the Accubond...
 
Couple things. The 300 wsm I had on a m70 extreme weather allowed a max coal of ~3" so depending on what magazine you have you might not be stuck with the short and ugly remington et al version. If you don't have one yet get yourself a long drop tube. Makes things easier. I have used h1000 with the 300 wsm and several ~200gr bullets (200 partition, 200gr accubond, 208 amax, 210 berger etc) . You won't fit enough of it in the case to to get to 65kpsi which is max for that case. I also liked 7828ssc but lots of powders work.
 
Try RL-19 with the 200's. I shoot 200 sierra GK's over 68 grains which is the max load in sierra guide. Shoots awesome and approaches 3000fps in a Sako Bavarian. I found the .300wsm didnt like to be pushed to get maximum accuracy it was happy around factory velocity, but this load shot exceptionally well.
 
It's a Savage Precision Carbine on which I'm installing a stock 300 WSM that came off a model 16. The mag does allow probably close to 3". It's not installed yet. So I could not try if a large COAL will work... I already have a big inventory of Hodgdon powder which explains why the H1000.

Question for KMAN300: how much H1000 did you use for 200 Accubond?

Thanks, very helpful!
 
kman300 said:
Couple things. The 300 wsm I had on a m70 extreme weather allowed a max coal of ~3" so depending on what magazine you have you might not be stuck with the short and ugly remington et al version. If you don't have one yet get yourself a long drop tube. Makes things easier. I have used h1000 with the 300 wsm and several ~200gr bullets (200 partition, 200gr accubond, 208 amax, 210 berger etc) . You won't fit enough of it in the case to to get to 65kpsi which is max for that case. I also liked 7828ssc but lots of powders work.
Click to expand...


7828 and H1000 are kissing cousins in the rate of burn schedule.

IMR 7828 is 1% faster than H1000, so loads listed for IMR7828 would be safe for H1000

Back in the day, there was a rumor that they were the same powder, in a different container. Similar to H414 and W760. They're not and never were although one was developed to copy the properties of the other. I got that from Tom Higginson. If he didn't know, no one did.

The other powders suggested, would likely be better bets. The WSM case just isn't conducive for best results, consistency wise with such slow powders.
 
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