Help me decide which 22LR bolt action

[1mechanic]

On rimfire central some were saying to shoot 50-75 rounds of the same brand before testing groups.

 

[KsKevin]

On rimfire central some were saying to shoot 50-75 rounds of the same brand before testing groups.

I have 700 rounds down this barrel now and have been shooting Norma TAC22 for the past 400+ rounds now.

To your point, the serious rimfire benchrest guys at my local club (one who places in the nationals every year) have said similar things about at least 20rounds if you switched ammo to settle in due to different lubricants and lead composition.