Absolutely it is! It takes you out of the running of a few of the most competitive schools, but you have a great shot at all of the others! Especially with really high grades in the science classes.
If you're trying to figure out which schools you have the best chance applying to, go to http://www.all-crna-schools.com
. For many of the schools, it will tell you how many people apply vs. how many they accept. I've found that the cheapest schools, the biggest schools, and the crna schools that are the only ones in the area are the most competitive. The west coast, for instance has a very large population and very few schools to choose from. They're all really competitive for that reason.
Florida, on the other hand, has 9 schools to choose from - they're a little easier to get into - so I've heard.
Hope that helps.