I built an identical 223 trainer so I could “save money”, but after spending $6500 (Impact, Bartlein, Schmidt, Spuhr, Foundation, new mags, etc) I think I would’ve been better off buying 10-15 extra dasher barrels.
I don't think so... You just need to change your approach a little.
I've been working on load development on a new 223 PRS rifle myself lately and I could not be more impressed with it.
It's practically a clone of my Cadex CDX Tac but with less recoil.
It has a 1:7 Bartlien barrel and a long throat. I was out on Sunday chronographing loads with fire formed IVI brass that was neck resized.
I'm running Hornady 88 Grain ELD match at over 2900 FPS and getting around 1/2 MOA at 100 yards.
The BC on the 88 grain bullet is as good as or better than what most PRS shooters run in their 6MMs and the speed is comparable to or even greater than 6BR guys are running while I'm getting less recoil.
You can call that a training rifle if you want to but 5 years ago everyone wanted a 6.5 Creed... then 6 Creed... now 6x47 or 6 Dasher or 6 BR... see a trend here yet?
Guys are seeing the benefit of reduced recoil with good... not great... but good ballistic performance.
I think maybe you might want a little longer throat and tweak the mag so you can feed rounds as long as 2.625" or so... Other than that, you should be good to go.
88 grain Hornady ELD Match / .545 G1 BC / .274 G7 BC Seated to 2.575" OAL
27.2 grains of 2000MR runs 2933 FPS
25.0 grains of 8208 XBR runs 2920 FPS
25.5 grains of Varget runs 2902 FPS
(Compressed load)
26.5 grains VV550 runs 2903 FPS
13.75 MOA 3.999 MIL Drop at 670 Yards
Based on primers, none of these loads seem hot in my rifle... Primer edges are still rounded.
Keep in mind, these are fire formed cases I'm using that have been neck resized only. I also do not resize the whole neck. I adjust the die so the neck is only sized to about 0.020-.030" above the neck to shoulder junction. this helps maintain correct seating depth without jamming the base of the bullet into the donut.
If you run full length resized brass, you should stay under the powder charges listed above by a full grain.