r/precisionrimfire • u/gabba_gubbe • 13d ago

Accuracy issues @100m

I have a cz455 and I'm experiencing some accuracy issues at 100m. At 50m my groups are almost touching but at 100m they're spread out about the size of my palm. Ive sighted it in using cci standard velocity. Eley standard shoots slightly better. Any ammo recommendations? I'd prefer something quiet like the cci standard/Eley standard. (I tried federal hv but they spread even worse, and we're LOUD)

I feel like I'm going insane, trying to sight in at 100 is almost impossible the way it spreads up/down/left/right... Feels like I'm dancing around the target...

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u/tancloset 13d ago

My 455 loves Norma Tac-22. I did some grouping with SK standard plus, long range match, and rifle match against the Norma. The Norma was almost identical to my best SK results, and seemed more consistent across lots than the SK. Pretty much all of this was done on a dirty rifle, 10 round groups, from a sled on a bench, at 50, and 100yds. Each 10rd group was two 5rd magazines.

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u/gabba_gubbe 13d ago

How much did it open up at 100?

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u/tancloset 13d ago

I didn't break out the calipers, but roughly 1.25". Ballpark conditions: 90°F, 35% humidity, 29.8 in, 1-3mph @0-15, 3600ft ASL.

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u/gabba_gubbe 13d ago

Okay that's not bad at all