The follower is not the problem. An understanding of the various mfg. shotshell cartridge lengths is the karma. A 2-3/4" standard shot shell is the maximum opened length upon firing of the cartridge, i.e. the "petals" of the pleated end of the cartridge must not exceed 2-3/4" in order to be properly managed by a barrel chambered for 2-3/4" shotshells; same for 3" shells / barrel chambers. So when comparing various brands of 2-3/4" shotshells you will observe the unfired difference in their lengths, THIS is what collectively determines how many 2-3/4" cartridges can be inserted into a magazine of fixed length. A few 1/16" / 3-32" differential adds up when loading 4-5 cartridges, this is the governing factor as to whether one can load 4 of brand A v. 5 of brand B cartridges.