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Post by Richard on Mar 29, 2016 20:57:16 GMT -5
Duplexing the AccuMax Beautiful day at the range for shooting…………………40*, Carolina Blue Skies with no wind. Starting out with a clean .45 Brux barrel. Shot some 250 gr. XTP’s to foul the barrel. Note first shot some 200 fps slower than the subsequent four. First four with no wad and the last shot with a veggie wad. On target #2 I wanted to re-visit the 12/58 Clays/H-4198 duplex that shot well a few weeks ago with my hollow base 274 gr. SST and Fed.209A primers. It did pretty well at 100 posting a .780” three shot group. Next, I move the same load out to 200 yards with no scope adjustment. The first shot was about 4” low. I adjusted up 1 ½ MOA and shot three more. It still needed another ¼ MOA up. My #4 group was actually only a couple of foulers with straight H-4198 so not group. For #5 I went with the Pittman AccuMax 300 gr., no wad, straight 73 gr. H-4198 and Federal 2090A primers………200 yards…………Three shots in .713” at 2754 fps with an 18 fps ES. Next up was the 294 gr. flat base SST with 5/66 Clays/H-4198. Av. speed was 2738 with a 15 fps ES and a three shot group of 1.250” at 200 yds. Keeping with the 5/66 duplex I shot five 300 gr. AccuMax’s into 1.100” at 200 with an average speed of 2743 fps and a 13 ES………….Actually the first four shots had a 6 fps ES! 100 yards………. Next, I brought out the Rem/Shilen ML. It did not like 73 gr. of H-4198 and the CCI 209 Mag. primer. The first bullet looked good but the second moved to the right an inch or so and key holed? Shot #3 went low 7” and right 4” and it key holed! Back to the 5/66 duplex and a 6 shot group measuring .965” with an average velocity of 2773 and a ES of 10.5 fps. So tell me a good duplex can’t straighten out key holing single powder load!!!  image sharing[/url
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Post by Deleted on Mar 29, 2016 22:30:57 GMT -5
Good reporting Richard. I need to get out myself, been waiting on weather conditions and time constraints.
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Post by hillbill on Mar 30, 2016 3:57:07 GMT -5
X2 on the report Rich, I will likely do some duplex testing myself with my new short barreled gun when it gets fired up. I want to work up a good hunting/cold weather load with 300s that make some decent speed with the 23" tube.
Looks like the 300 AM is a consistent hole driller from many guns including yours, I look forward to trying some as soon as time permits. |
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Post by schunter on Mar 30, 2016 6:20:49 GMT -5
Looking good Richard. The Shilen liked that duplex....
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Post by Kyle on Mar 30, 2016 6:26:47 GMT -5
Awesome ES's and awesome groups Richard!!
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Post by Richard on Mar 30, 2016 11:47:19 GMT -5
Thanks guys.............! This is not a pitch by me to disregard your scales for weighting out charges of powder but..............If you look at the ES's I get (as Kyle mentioned), these loads are ALL thrown with powder measures. I use a Lyman 55 to throw the Clays and a Harrell's to throw the 4198 charges. The small amounts of Clays will throw to within 1/2 a grain every time. The 4198 will throw to within one to two tenths of a grain. I have tried and found that weighting charges exactly on my scale results in no better ES's than if I throw them with the measure. I have found different bullets from the same lot and run thru the same die go down the bore with "more or less" pressure from time to time? And its things like this that are more detrimental to consistent velocities. I don't always get ES's this low with my CF match loads which I weight to the "kernel?" For me, it saves a whole lot of time preparing to go to the range!  |
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Post by Hank on Mar 30, 2016 11:58:35 GMT -5
That is so darn good shooting Richard,, and I also just through my charges on an old RCBS powder thrower.. Works good for me...
Looks like you will be the man to beat at the shoot this year......
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Post by Yankee Bill on Mar 30, 2016 12:33:05 GMT -5
That is some awesome shooting indeed Richard, well done! Wish you were nearby me, I'd try to get you to shoot my gun to see what it is really capable of .
YB
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Post by Deleted on Mar 30, 2016 13:35:24 GMT -5
Good info Richard. I have also been comparing singles vs duplex and have found a Winchester 209 is more consistent. Of course I have more consistency with wool wads also. I use an RCBS Chargemaster. It weighs them out with very little wait time after preparing the next tube for filling.
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Post by Richard on Mar 30, 2016 16:40:47 GMT -5
Scat........I have the chargemaster also but still prefer the powder measure for speed. BTW, the chargemaster does not throw as accurate as you might think. I was weighting charges for my match rifle on the chargemaster at two tenths of a grain light..........then dumping them in my beam scale and trickling up. Sometimes the two grain light setting would actually throw the exact amount.........instead of light??? I now take a loading block with fifty .308 fired cases (spent primers still in) and throw my 32.8 gr. of Varget in them. Takes me only a couple of minutes to do all fifty. Now I dump the case on my scale and trickle to 33 gr. for my 6mmBRX. You would be surprised how close each of the fifty cases are to being 32.8! The first pictures is from a while ago where is was using the chargemasster first and then trickling on to the scale. The second one you can see the loading block with the 50 .308 cases I use now for storing the "light" charges and the third one you can see the stand with my two powder measures. Again, nothing wrong with using the chargemaster or any scale.........but when you load as many different loads as I bring to the range, the powder measure makes mnore sense and you can see it does work.  image post images screen shot windows |
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Post by Deleted on Mar 30, 2016 17:34:59 GMT -5
I understand. Sometimes my Chargemaster comes up .2 over and I just toss those charges back into the powder reservoir. My powder measures have issues with certain powders like 2400 that I use in my 44mag or W748 and H4198 where it tries to break or cut the grains as it closes. I suppose I could invest in a better thrower but with the simplicity of not having to dial the the Chargemaster in on each load, I have stuck with it. With my thrower I found myself weighing the charges anyway.
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Post by Deleted on Mar 30, 2016 17:42:07 GMT -5
Richard, your reloading area looks like something a mad scientist might use.....LOL.......... Looks like about everything you need there!! |
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Post by jims on Mar 30, 2016 18:42:31 GMT -5
Some nice groups
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Post by elkman1310 on Mar 30, 2016 18:51:03 GMT -5
Good shooting Richard, I am glad to see your starting to get some range time with the Shilen. I do not use H4198 I only use IMR 4198 with 73grs and a 300 gr bullet. I have not had a bullet keyhole with a Shilen barrel and straight powder charges of 70 to 73 grs. That is a rock solid load in all the guns I have built. If you get a chance try IMR 4198 with fed's or CCI 209 mag. There is no way you should get a keyhole with that load. I shot 73grs of IMR 4198 and the 270 Emax without a wad the other day and it shot really good.
The only barrel that has ever key holed for me is my Douglas. That barrel needs a wad. With a wad it shoots really good. That's the gun you posted for me on Doug's a while back that I shot a 2 1/2' group at 600yards with.
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Post by Richard on Mar 30, 2016 20:57:53 GMT -5
Carl...........I have shot IMR 4198? Last week with the Accumax and it shot great! But so does Hodgedon's 4198 and the velocities are the same? As a matter of fact I have already formulated a test for next week...........I am going to intermittently shoot a group with 73 gr. of H and 73 gr. of I 4198........One shot H, one shot I, one shot H, one shot I etc! All on the same bull. The groups this week were Hodgedon and the velocities the same as last week with IMR?
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