There is nothing wrong with the lighter bullets fired out of a 15" barrel. The heavier bullets are more efficient, but the 90-110 grain bullets will work fine.
I hesitate to recommend the Simmons handgun scopes. Over a decade ago, Simmons offered a 2x7 handgun scope which was so good that JD Jones of SSK recommended it for his handcannons. I almost didn't believe him as I had two previous Simmons handgun scopes fail prior to that, but I broke down and got a new one. It is a fine, rugged scope although its optics aren't on the level of Burris or Leupold. The fly in the ointment is that Simmons has changed a lot since then and they are now a part of the Meade Group. Their products are now made to a price point, and Meade ranks its different optics companies to price points (Redfield, Weaver, Simmons).
I bought a Simmons scope for a .22RF three years ago and was very dissappointed. I would not trust a current Simmons handgun scope an a handgun with the recoil your .270 will produce. Others are welcome to disagree with me, but it
is my money. Buy a cheap scope which fails - you don't have a scope and you don't have your money.
http://www.charm.net/~kmarsh/scope.html.
