What are the dimensions of the 130 grain compared to the 160 grain heads?  Are the 130 grain as strong as the 160 grain? Thanks, Jonathan

Same size.  Steel is just thinner on the 130s, and thus they're probably not as strong, but strong enough.  I use the 160s for more FOC.

Like he said, the dimensions are the same.  The 130's are slightly thinner.  I've always used the 130's and never had a problem, but I put a tiny tanto point on all my heads.

I would suggest you pick the weight that tunes best in your set up, they are all good.

  STOS Broadheads

After doing tanto tip and filing to single bevel my 160s are around 145.

I've used both.  The big ones for buff and the 130's for regular game on my smaller poundage bows.  I just ordered more last night and some for a friend.  I put a tanto point on all of them as well and they really hold up.  I shot a hog this weekend quartering away hard with a 130 and my 57 lb Horne.  I missed the spot where I was looking and hit the neck.  The 130 Stos went into the neck, through one side of the skull and got almost a complete pass through on the other side of the skull.  It was truly awesome so see the power.  The Stos still looks new.  BTW, this was a mature boar so his skull was pretty big!  Incredible as it seems, the pig still went about 100 yards before piling up....they are tough.

Personally I wouldn't use anything except the 160's, I have seen several of the lighter ones curl up or bend on heavy bone. Even then I would take off the needle point or put a "tanto" tip on them.