Originally Posted by gunlearner
does the effective range gets shorter with the effect of open sea.
please help me with that info
Yes and no.
On calm water, of course gravity isn't changing, etc.
Inside the breakwater/surf, you're in for the extra bumps and the extra wind gusts.
Past the surf you've got the rolling waves and steady wind.
Overall, you're going to have a bigger wobble zone from boat motion and wind is unforgiving to flat-base 9mm bullets.
With iron sights, reflected light from the water plays hell on windage (gets intense focusing on the post). If you've the sun low in your face too, it's twice as bad as on land.
A rifle certainly stands even more superior than your 635's out on the sea. Your main obstacles are 1. wind 2. waves 3. changing conditions.
How less effective your carbines are is going to depend a lot on how adaptive, competent, and skilled your personnel are.
p.s. Something to help you in the powercurve with repeated fire with those Colt 635's, making that wobble zone have less affect. Follow through on those Colt triggers: Notice when you fire, if you hold the trigger back, then slowly release you'll hear a loud "thunk" in the receiver.
A lot of amateurs completely release the trigger after each shot. Practice just releasing until you hear the "thunk", then get your sight picture back, and squeeze again. It takes several pounds off the Colt trigger pull. Your accuracy will improve.
Train your boys to follow through each shot by not fully releasing those triggers...it will take them practice to make a habit, but it's worth it...they'll squeeze more potential from those 635's becoming more accurate with faster shots.