We’ve been talking stats a lot (yes, there’s also a compulsive gambler gene in the family). Anyway, I thought I’d share what I have from The Cancer Institute of NJ.
If you have not had breast or ovarian cancer:

Condition Mutation
Carrier
General
Population
BC by age 50 33 – 50% 2%
BC by age 70 56-87% 7%
Ovarian cancer by 70 27-44% <2%
Male BC by age 70 6% .05%

If you have had breast or ovarian cancer:

Condition Mutation
Carrier
General
Population
Ovarian Cancer 15% not available
BC after 5 years 27% 3.5%
BC by age 70 64% 11%

Other cancer risks*

Condition Mutation
Carrier
General
Population
Prostate Cancer by 80 20% 15%
Pancreatic Cancer 2-4% <1%

*They don’t have as much information on other cancer risks as they do for breast and ovarian.