"No bonuses to damage just more chance to get a chance to do more damage :>."
- as i know there is no any "bonuses to dmg", it gives just +5% to do a critical hit. It doesn affect a critical hit tables.
"As i know because of that i receive -20% penalty to my sg skills
What i need to negate negative effects is only raise SG skill by additional 20%."
-also u can use a buffout, psycho(but psycho isnt a good idea for snipers), and u can take a WH perk (+3 to str, when cheking a str penalty)
"Will i feel any additional negative effects? Like less critical chance? Penalty for crit tables??"
- critical chance will be the same. No any penalties for critical hit tables, checked a lot of times by my hTh char.(there no any difference between 160 or 300 hth skill)
-and yes, there is some negative effect (but low sg skill doesnt affect it somehow/). If you have low str, you will have more critical failures. I mean, if your weapon requires 5 str and you have less than 5