Huge load workup project for DTech AR
Posted: Tue Jul 29, 2008 9:47 pm
Hi guys,
Been lurking in here and on many other boards since ordering my 204 from DTech back in what feels sometimes like the 70's. He had a delay on 1:10 twist barrels from Shilen. I feel I've soaked up alot of information on the 204 cartridge over the past months, and am really looking forward to seeing how this thing shoots. It should be ready any day. I just started reloading this spring, and have so far successfully worked up a load for my .270 Win.. In the .270, I was really only trying to get a load for the 90gr Sierra HP, and with 4 powders, I think I made up over 180 rounds to find "the one". Can't wait to see how that load performs on game. A .277" 90gr HP with 3500fps MV. My .270 is away getting a trigger and bedding job right now, so I hope I can get it back and shoot better than the ~MOA I got with this load.
My 204 will be a 23" 1:10 twist, with Mike's compensator. A tuned RRA 2-stage trigger. Glass will be a 30mm 4-16x50 Millett TRS-1.
At this point, I have 1000 Winchester brass that I've put through the following operations, in order:
1. Uniform flash holes
2. Uniform primer pockets
3. Full length resize
4. Trim to 1.839 (If i remember correctly, I think I had alot of brass that were right at 1.84, and wanted to take at least a bit off all of them.)
4. Chamfer inside case mouth (I cheated here and bought a 3-way cutter for my Trim Pro, trim/chamfer/deburr in one step.)
4. Deburr outside case mouth (I cheated here and bought a 3-way cutter for my Trim Pro, trim/chamfer/deburr in one step.)
5. Prime with Remington 7 1/2 BR (I primed 100 of them with CCI 450 SR Magnum primers.)
Bullets In Stock:
Hornady V-Max 32gr Flat Bottom Ballistic Tip Hollow Point
MidwayUSA Dogtown 34gr Flat Bottom Hollow Point
Berger 35gr Flat Bottom Hollow Point
Sierra BlitzKing 39gr Flat Bottom Ballistic Tip Hollow Point
Nosler 40gr Boattail Ballistic Tip Hollow Point
Nosler 40gr Boattail Ballistic Tip Hollow Point *Factory 2nds
Berger 40gr Boattail Hollow Point
Hornady V-Max 40gr Boattail Ballistic Tip Hollow Point
Hornady 45gr Jacketed SoftPoint
Powders In Stock:
Hodgdon H4895
Hodgdon H322
Hodgdon H4198
Hodgdon Benchmark
Hodgdon Varget
Alliant Reloader 10x
I plan on loading up a couple hundred mild loads to break in the barrel with. After that, I have alot of loads to trickle one by one.
I plan on writing up an article on the whole ordeal. It'd feel like too much work if nobody else could benefit from it. If any of you have any powders/bullets you'd like to see involved, let me know. If it's too out of whack, you may have to send it to me, but for now all I think I really may be missing for bullets is the 50 grain berger. The way it sounds, I bet they shoot out of the 1:10 barrel too. I'd also like to try some of those Unmussig bullets, but am scared to find out the price of them.
The way everyone talks, I'm betting the 39gr BK with 4895 will be the overall winner, but am hoping the Nosler 40 shines as well because I can get the 2nds cheaper than the dogtowns. I like the idea of using a Hodgdon Extreme powder, if it actually means they'll be less effected by temperature extremes. It's gonna be 90 for the next couple weeks here, and -10 on a few coyote outtings. I suppose I may have to adjust the load for winter no matter what powder I want to use, but I'd like to test them when temps are at their hottest.
Any advice/ideas would be appreciated. (Where have I already screwed up? : )
Thanks
Been lurking in here and on many other boards since ordering my 204 from DTech back in what feels sometimes like the 70's. He had a delay on 1:10 twist barrels from Shilen. I feel I've soaked up alot of information on the 204 cartridge over the past months, and am really looking forward to seeing how this thing shoots. It should be ready any day. I just started reloading this spring, and have so far successfully worked up a load for my .270 Win.. In the .270, I was really only trying to get a load for the 90gr Sierra HP, and with 4 powders, I think I made up over 180 rounds to find "the one". Can't wait to see how that load performs on game. A .277" 90gr HP with 3500fps MV. My .270 is away getting a trigger and bedding job right now, so I hope I can get it back and shoot better than the ~MOA I got with this load.
My 204 will be a 23" 1:10 twist, with Mike's compensator. A tuned RRA 2-stage trigger. Glass will be a 30mm 4-16x50 Millett TRS-1.
At this point, I have 1000 Winchester brass that I've put through the following operations, in order:
1. Uniform flash holes
2. Uniform primer pockets
3. Full length resize
4. Trim to 1.839 (If i remember correctly, I think I had alot of brass that were right at 1.84, and wanted to take at least a bit off all of them.)
4. Chamfer inside case mouth (I cheated here and bought a 3-way cutter for my Trim Pro, trim/chamfer/deburr in one step.)
4. Deburr outside case mouth (I cheated here and bought a 3-way cutter for my Trim Pro, trim/chamfer/deburr in one step.)
5. Prime with Remington 7 1/2 BR (I primed 100 of them with CCI 450 SR Magnum primers.)
Bullets In Stock:
Hornady V-Max 32gr Flat Bottom Ballistic Tip Hollow Point
MidwayUSA Dogtown 34gr Flat Bottom Hollow Point
Berger 35gr Flat Bottom Hollow Point
Sierra BlitzKing 39gr Flat Bottom Ballistic Tip Hollow Point
Nosler 40gr Boattail Ballistic Tip Hollow Point
Nosler 40gr Boattail Ballistic Tip Hollow Point *Factory 2nds
Berger 40gr Boattail Hollow Point
Hornady V-Max 40gr Boattail Ballistic Tip Hollow Point
Hornady 45gr Jacketed SoftPoint
Powders In Stock:
Hodgdon H4895
Hodgdon H322
Hodgdon H4198
Hodgdon Benchmark
Hodgdon Varget
Alliant Reloader 10x
I plan on loading up a couple hundred mild loads to break in the barrel with. After that, I have alot of loads to trickle one by one.
I plan on writing up an article on the whole ordeal. It'd feel like too much work if nobody else could benefit from it. If any of you have any powders/bullets you'd like to see involved, let me know. If it's too out of whack, you may have to send it to me, but for now all I think I really may be missing for bullets is the 50 grain berger. The way it sounds, I bet they shoot out of the 1:10 barrel too. I'd also like to try some of those Unmussig bullets, but am scared to find out the price of them.
The way everyone talks, I'm betting the 39gr BK with 4895 will be the overall winner, but am hoping the Nosler 40 shines as well because I can get the 2nds cheaper than the dogtowns. I like the idea of using a Hodgdon Extreme powder, if it actually means they'll be less effected by temperature extremes. It's gonna be 90 for the next couple weeks here, and -10 on a few coyote outtings. I suppose I may have to adjust the load for winter no matter what powder I want to use, but I'd like to test them when temps are at their hottest.
Any advice/ideas would be appreciated. (Where have I already screwed up? : )
Thanks