I hear you on not your own meat back. I know most ground meat (jerky, stick and salami) will be ground in batches most places and given out by weight brought in. Whole meat Jerky not sure, but would hope to get your own back.
Thompson has been awesome for me. Recieved weight appropriate back. Not so worried on ground processing with all the seasoning. Hopefully checked for cleanliness.
I once took my best cuts all cleaned up to processor in Orem/Provo and never again. He went straight to his drawers and pull out several packages if jerky and handed it to me in exchange.
Just my experience on processed jerky, salami and pepper sticks.
I have cut all my own wild game for 40 plus years, so I know what I put in my freezer.