Both are very flat shooters. The .270 should also have a slight power bump. I used a combination of energy stats and ballistics tests to modify my damages. For instance, the 5.45B does the same amount of damage as the 5.56N in my game. The 5.45B uses a 60 grain bullet to the M855's 62 grain bullet. Therefore, I reduced the 5.56N to a DAM of 2 and made the 5.56N round's PEN 1/2 at Short Range (as penetration is a hallmark of SS109 rounds). I leave the 5.45mm Block's PEN alone as this round has a "void space" near the base of the bullet that collapses to induce tumbling. I give the 77 grain SMK 5.56mm Nato and the MK318 frangible loads the 3 DAM and normal Penetration ratings. I made the 7.62mm X 39mm a DAM of 3 and 7.62mmN a Dam of 5. The .30-.30 is a ballistic cousin to the 7.62mm X 39mm so it's Dam and range is identical. The .270 should be a Dam of 4 and have a penetration like the 7.62mmN. It would have a range bonus because it "shoots flatter" than the 7.62mmN. I'm not familiar enough with the .243 to give any input on that round right now. I'll see what my "shooting Circle" has to say.
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