Hello, I am new here and new to precision bolt actions in general. I figure before I ask my question I will give you some info that might be relevant to my question.
I just bought a Remington sps tac 308 and dropped it in an AICS 2.0 last month and have been shooting it at 100 yards. With Federal GMM I have been able to shoot under .5MOA 3 round groups and with 17 year old mil surplus ammo I have recorded several .5MOA 3round groups as well, but more often than not the groups are larger with the surplus ammo. Seeing as that I am a noob to this, we can surely agree these numbers will shrink with more experience, and I am not about to blame my shortcomings all on ammo selection. I zero'd my scope using 168gr Fed GMM at 100yrds.
Which brings me to my question at hand. This weekend I was shooting german surplus 147gr, which before adjusting elevation on my reticle consistently hit about 2MOA high. I noticed a troubling pattern arise every few groups, where my first two rounds' POI would be touching, but the third would be way off - by about an inch. After shooting 20 3round groups, 5 or six looked like this, ALWAYS with the third shot being the one way off. I attached a pic of three of them to give you an idea of what I mean. Im sure if I were using nicer ammo this would have been less extreme, but I was hoping someone could lend some insight (other than the obvious 'more practice') that might help me get better and avoid this.
Note* Im still figuring out scope adj. for cheap 147gr vs. Fed 168gr, hence the POI's being way off center in these 3 groups.
I just bought a Remington sps tac 308 and dropped it in an AICS 2.0 last month and have been shooting it at 100 yards. With Federal GMM I have been able to shoot under .5MOA 3 round groups and with 17 year old mil surplus ammo I have recorded several .5MOA 3round groups as well, but more often than not the groups are larger with the surplus ammo. Seeing as that I am a noob to this, we can surely agree these numbers will shrink with more experience, and I am not about to blame my shortcomings all on ammo selection. I zero'd my scope using 168gr Fed GMM at 100yrds.
Which brings me to my question at hand. This weekend I was shooting german surplus 147gr, which before adjusting elevation on my reticle consistently hit about 2MOA high. I noticed a troubling pattern arise every few groups, where my first two rounds' POI would be touching, but the third would be way off - by about an inch. After shooting 20 3round groups, 5 or six looked like this, ALWAYS with the third shot being the one way off. I attached a pic of three of them to give you an idea of what I mean. Im sure if I were using nicer ammo this would have been less extreme, but I was hoping someone could lend some insight (other than the obvious 'more practice') that might help me get better and avoid this.
Note* Im still figuring out scope adj. for cheap 147gr vs. Fed 168gr, hence the POI's being way off center in these 3 groups.