I have one that I used on my 10 day Colorado elk hunt, we packed in about 4 miles with 70lbs and it did well, before I went I would go to the local 3d shoot with 60 to 70lbs in it and shoot the course, I had no issue drawing and shooting. I didn't pack an elk out so I cant give you any info...
Try walkback tuning, i have had bows that were almost impossible to get a good paper tear but with walk back tuning they shot great.
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You won't regret going with the S7, awsome camera and with the external storage you can take thousands of pics.
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Try drawing back and keeping your finger off the trigger and just hold your pin on target, then let down . keep doing that till you can hold rock solid then try slowly pulling the trigger.