My reduced load shoots to the left

[ozyclint]

I have been playing with a reduced load in my .222rem which consists of 20gr of AR2206H (H4895 in American speak) behind a 40gr JHP used in .22wmr ammo, for 2550fps. I bought 250 of these bullets loose.

Groups nicely, with a 3 shot group of about 3/4" at about 80m but it's 4" left of where my standard full power load shoots. Full power load is 22.8gr of AR2206H behind the Sierra #1330 50gr soft point for 2950fps.

Any reason these would shoot so far left? Just barrel harmonics? it can be accounted for but it would be nice if it shot the same windage.

 

[Slugz]

Barrel harmonics vs the burn rate of the powder. You are correct sir.

 

[Pickettpuncher]

Barrel harmonics. Just adjust the scope. Before I ever understood barrel harmonics when I first started loading I was trying different bullets. Shot some 165 and 150 grain in a 308. One was about 6” to the right, instead of one being lower. Blew my mind, but it got me educated.

 

[Mule3006Elk]

No worries. To be expected. My reduced loads have always had a different POI for reasons you already pointed out.