Testing .223 40grain factory ammo with my CZ527 laminate, 24” barrel with1 in 9 twist.
Reason for my test. When using NV scopes I have difficulty with judging range of targets. Looking at the NV scopes monochrome screen,( very much 2D to me), I was never sure if I was seeing a fox cub up close or a big dog fox much further away? Anyway I thought perhaps a flatter shooting bullet like that from purchasing a 22-250 rifle may be a way forward, but that’s an expensive option. I’m happy with my usual ammo, the 55gr Winchester Ballistic Silvertips, but something a bit faster & flatter shooting like a 40gr bullet, might just do the trick? BUT the big question for me was would a faster 40gr bullet, usually around the 3700 fps, be any good in a 1in 9 twist barrel? I had doubts as many knowledgeable riflemen had told me a 1 in 12 twist would be more suited to this faster 40gr bullet.
Purchasing just two lots of factory ammo to try, I chose the Federal V-Shok 40gr ballistic tip @ 3700fps and the Norma 40gr ballistic tip @ 3740fps.
Target was set at 125yards and to my surprise (& shock) I clover-leafed the 3 shots of Federal ammo! I have never ever clover-leafed a 3 shot group at this range, and group was ½ inch high directly above the bull.
Well now for the Norma 40gr BT. Sadly back to my usual grouping. Like the Silvertips, about 1¼ inch grouping, only this group were unexpectedly about 1½ right of the bull: go figure?
I will be trying the Hornardy 40gr V-max @ 3800fps, as soon as my RFD gets a delivery, but those Federal V-Shok are going to take some beating. Like the knowledgeable riflemen keep telling me, to get the most from your rifle you have to experiment and match the ammo to the gun, or vice versa?
Hope this info is useful to someone.