Tact driver - Radical Firearms Rf Complete Upper Cfu22-224val 15mhr .224 Valkyrie 22" Ss

bought this complete upper on sale for a great price from optics planet an was very happy when I received it, very solid and well built complete upper from radical firearms.i thought I would try out the 60 gr. .224 varmint ammo first, mistake, the 60 gr. ammo could not handle the 1 in 7 twist, it tore the jacket right off the lead core and hit the target in pieces. so I email radical firearm about this situation they were very helpful and recontacted me within minutes and recommended trying a bullet around 80 gr., so I tried the federal premium tsx barnes 78. grain hollow point all copper bullet and WOW! what a difference it was a perfect match for this upper sub MOA at 100 yds. ,radical firearms customer service is awesome and so is there product, not to to mention again optics planet awesome price, thanks everybody