DEBob; Is your bear a newer bow that accepts and will use the newer string materials like df97 or fastflight, or an older bow with dacron string? If it's an older bow, start with the 1816 and if it will use the low stretch string start with a 1916. My wife pulls 45# at 26" with a Chek-Mate Hunter II with DF97 string and a 28" 1916 is the arrow it likes best. Her 40+# Martin Hunter likes the same arrow.