Last week I received all the components needed to start reloading .223 on my Dillon XL650. I've been loading 9mm for about a year now and I'm wanting to develop a load for training with my AR-15. I loaded some test rounds and went out yesterday to record data with my chrono.
My loads were....
- Hornady 55 grain FMJ
- PMC Brass trimmed to 1.750"
- CCI Small Rifle No. 400 Primers
- CFE223 (test rounds loaded at 24.0, 24.5, 25.0, 25.5, 26.0, 26.5)
- 2.245" OAL
* shot out of 14.5" barrel
I searched the forum and web for CFE223 load data and found most used 25.0 grains - 27.0 grains so I loaded my test rounds at 24.0, 24.5, 25.0, 25.5, 26.0, 26.5. All the cases gauged correctly in my Dillon Case Gauge.
I started off shooting some Federal .223 55 Grain FMJ which had an average of 2,763 fps. and ejected towards 4:00.
I then went to my reloads and started with 24.0 grain loads which had an average of 2,381 fps, 4:00 ejection pattern and had light felt recoil.
Next was 24.5... averaged 2,414 fps., 3:00 ejection pattern and had just slightly more felt recoil than the 24.0 grain loads.
I went to 25.5 grain loads which averaged 2,551 fps, had a 2:00/1:00 ejection pattern and the recoil was strong. The ejection pattern of the brass and the felt recoil make me think there may be too much pressure but the velocity was 200 fps. lower than the Federal that I shot. I didn't try the 26.0 or 26.5 loads because of the signs of high pressure with the 25.5 loads.
I moved my chrono around a couple of times, changed my distance slightly and had the same fps results. Even if the reading wasn't exactly correct, all the results were recorded at the same time, in the same conditions and my reloads had lower velocity & more recoil than the Federal. Can anyone give me some advice on why I had signs of higher pressure and more felt recoil with my reloads that were 200 fps. lower than the Federal rounds I shot?