the one gallon bags are fine as long as you don't throw in more than 56grams of dry material. I have run many batches thru my one gallon bags, and never found it to be a problem> They were designed to work with two ounces, so if your running a single ounce, and getting 2 to 3 gram of resin per ounce. that is very close to what is there.
Most ounce's do not contain more than 4 grams of resin on it.

Peace
Bubble man