Sounds like your first two shots worked very well. If you intend to mostly hunt with your rifle, quit while you're ahead. If it ain't broke, don't fix it. For target shooting you could try a .15 patch, but I don't think that's going to fix the heat distortion.
You Have enemies? Good. That means that you've stood up for something in your life. --Winston Churchill
The right to buy weapons is the right to be free. -- A.E. Van Vogt