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continuation of 17 tcm/179mm
I was having photo problems. Here is my 20 Boomer, chambered it Friday, shot 12.8 gns AA 1680 6.5 Rem at 3100 fps or so and very accurate no barrel heat, I think its going to be a good P dog killer. Any more specs or questions please ask. sgtg out Last edited by sgtg; 10-13-2014 at 03:19 PM. |
#2
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Sgtg..... Very nice job, looks like you have it dialed in. I like the neck length.
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#3
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Great looking brass. What were your final brass prepping procedures?
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Waska |
#4
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Wow! That's way cool. Those rounds look perfect.
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#5
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Looking VERY good!
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#6
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those are CUTE!
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Daryl |
#7
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Thanks to all. The neck length is .19, I'm with ray h and like the 40 deg. shoulder but a little more neck length. I wanted to move as little brass as possible, the body is .372-.364.
Waskawood; The die in the picture is like a Redding bushing die that would be perfect for a 22 TCM. I do three steps down on neck diameter, then expand to .204 and trim overall length to 1.02, then turn neck OD. Then one more size in die to get .2025-.2030 ID, that is ok neck tension, load and shoot. I pulled the ejector out of my bolt so the case stays on the extractor when opened, much better than shaking them out, just pick them off bolt face. sgtg out |
#8
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powder choices
I loaded 12.8 gns. AA 1680 and got 3100 fps. with no pressure, primers are still round. 13-13.2 I'll be out of room with 1680. What powders would you guys try? I'm thinking Lil gun, RL 7, H4227, Power Pro 300MP, VV120, or any others. I think I need just a little quicker powder, AA2200 is too slow (can't get enough in case) I would appreciate your thoughts on any or all these,Thanks sgtg out
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#9
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300 MP worked well in my 17 VHA. Not sure how it would like the 20. Thanks for the information.
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Waska |
#10
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My first thought was 300mp as well, I remember a few guys getting nice velocity and accuracy in the 17 vha with it. I would have guessed you would get 3400 fps somewhere near what guys are getting with lil gun in their hornets? Just a guess
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-Every man dies, but not every man truly lives.- "I came that they may have life and have it abundantly" John 10:10 |
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