Not sure about Iowa but where I hunt here in Missouri, our acorn crops are down due to the dry spring and summer. I have seen deer, mostly does in the early morning hours. We just reached the low 40s at night and are in the mid 60s in the day. This should jumpstart the movement activities. If you can I would hunt the fields with any freshly harvested food type, soybeans, corn, etc in the morning. I have seen a lot of deer in the past years hit those early, If I can't make the early hunt I hunt the same areas toward the last hour of legal shooting time and they usually come back but you must be quiet abd scentfree or forget about it.I shoot the same bullet with 100grs of Pyro Pellets and I'm getting 1800fps and it's deadly out to 100yds. My guess you should be good out to 150yds since you are using T7 and a little more powder. Goodluck