I lived on SNAP (and food stamps) for most of the past decade. When I got off, my spending naturally stayed below the SNAP line from years of living on it, and spend around $125-150/month on groceries now.
I always found the full amount of SNAP - $175 (and then up to the $190's with the Obama stimulus money) to be rather generous, and since I've gotten off of SNAP, I haven't had a month in 4 years where I've gone that high.
Please remember that the majority of people on SNAP do not get the FULL amount. If you want to live on SNAP, you should technically live on a partial amount. You need to have an income under $800/month to get the full amount. This is why SNAP is essentially a cash transfer, because it's more common to get something closer to $10-80/month. The current average amounts are here.
Remember if you're following SNAP that $195 cannot include any energy drinks/bars, hot food from the grocery store, household goods, pet food, vitamins and obviously booze/tobacco.
Biggest advice: don't eat meat. It's expensive.