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23.5" 1:8 Bartlein
105 Hybrid
32.7 gr Varget
Lapua FF'd Brass
CCI BR-4
2929 FPS
I'm currently fireforming brass for another 23.5" 1:8 Bartelin barrel; I'm going to try 8208XBR and CCI 450 and see how it works.
Shot with a modest 31.5 grains of IMR 8208 XBR with 80 grain flat base bergers at 240 yards. Got 3105 fps and shot half MOA. At 100 yards we stacked bullets on top of one another. We just used this load to fire form our lapua brass. Can't wait to shoot the 105s to see what happens. I wonder if you give up barrel life to the IMR XBR vs Varget? Any thoughts or experience?
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Shot with a modest 31.5 grains of IMR 8208 XBR with 80 grain flat base bergers at 240 yards. Got 3105 fps and shot half MOA. At 100 yards we stacked bullets on top of one another. We just used this load to fire form our lapua brass. Can't wait to shoot the 105s to see what happens. I wonder if you give up barrel life to the IMR XBR vs Varget? Any thoughts or experience?
Prairie dog season is right around the corner, anybody have any 70-80gr varmint loads?
Specs:
26 inch bartlein barrel
1.555 chamber
272 no-turn neck
104 freebore
Defiance Deviant action
Primers CCI450
False shoulder formed brass
32.6 gr of Varget = 2978 fps (on average) SD 4.2
33.0 gr of Varget = 3006 fps (on average) SD 5.4
On a colder day 33 gr varget 2984 fps SD 1.4 ES 4
Specs:
26 inch bartlein barrel
1.555 chamber
272 no-turn neck
104 freebore
Defiance Deviant action
Primers CCI450
False shoulder formed brass
32.6 gr of Varget = 2978 fps (on average) SD 4.2
33.0 gr of Varget = 3006 fps (on average) SD 5.4
On a colder day 33 gr varget 2984 fps SD 1.4 ES 4
Fireforming load looks like it will be 29g of XBR8208. Initial test loads came back at 2700fps or so from my 26" barrel but it seems to form the case nicely and will be easy on the brass for the first firing. XBR8208 meters nicely in the Dillon so I'm loading those as progressive thrown charges, also goes very quickly. Got the first 100 cases loaded and will do a range day later this week for some barricade practice and see how they shoot at distance. Grouping from fireform charges was at 1/2 MOA at 100 yards in initial testing.
I too get very low ES's.....
32.6 Varget, Hybrids jumped .010, CCI 450. 26"
5 shots at 500yds with above load.
Started messing around with the new Dtacs. Shooting very well 32.7 Varget in a different 26" barrel at 2910. Dtac is in the case quite a ways with a .104 freebore. Having another barrel chambered soon, chamber will be throated longer for the Dtacs. 28", 7.5 twist.
Yes.
Quick update and thread bump. Took my 105 Hornady BTHP practice dasher load out to distance this weekend, shooting an IPSC at 1225 yards. Muzzle velocity of 2800 fps meant that these were well subsonic by the time they got out there, but we were still hitting 70% impacts across three shooters (one of whom was not experienced). The 105 BHTP seems to transition pretty well and the fact that the powder charges were thrown on a Dillon press didn't seem to create any major problems with vertical.
Nice! Should be a fun time. Hope the winds are kind to you.
Dasher was good to me last weekend, took second at the UNSC match. One stage was 5 shots from a rooftop barricade, choose either the 10" 8" or 4" target at 475 yards, more points for the smaller targets. I went for the little one and cleaned the stage, the spotter said it was printing a 1" group right in the center of the 4" gong.
Sweet Sheldon - I am heading out to Dougs place with the Dasher in 2 weeks. With 110 SMK going 2970 FPS ... will let you know how it goes.
You're getting 2970 out of the 110s !?! That's crazy good speed for a Dasher and more than I'm running with the 105s. Certainly a tough combo to beat.
32.8 of Varget got me 2950 with 110's, as soon as the weather got hot here in AZ, that load shit the bed. Pressure and vertical, H4895 is my next powder
Anyone using imr 4166 at all?
2940 sounds a bit more reasonable from the 110's up at peak pressures with lower 2900's as the safe node.
A good day at the range!
I think Ethan was running 2920 with the 110 SMK out of his Dasher on Saturday. 4 out of the top 5 shooters running Dashers lol... all the cool kids are doing it.
If you look at some of the metrics of powder burn and heat energy, XBR 8208 is a cooler burning powder than Varget. That should help prolong barrel life. My plan is to use a lighter charge of XBR 8208 for my 6 Dasher practice loads to stretch barrel life then run full power Varget loads for match ammo. We'll see how it goes