Squibs can happen to the best of loaders. The best advice is to be actively aware of your shooting session and the moment something doesn't feel or sound right, stop and check things out. If you do that, a squib load will not damage your firearm.

I only experienced one squib load from my reloads, and it was 38spl. Even though I double check all my rounds, and this batch checked out ok, I still managed to get a squib. To this day, I still don't know how it happened, but it did. However, when the round didn't sound or feel right, I stopped and found the problem. No worries.