M1Rifle30-06
New member
Kind of an amateur question, but can anyone familiar with the concept of Mean Rounds Between Failures (MRBF) confirm for me how exactly it's calculated?
I have a Glock 19 Gen 4 with 3,080 rounds through it. It has had one stoppage on an extended magazine.
Do you stick the stoppage in the middle of the round count? In that case it'd be dividing 3,080 by 2, which would be 1,540.
Or (and this is what I'm leaning towards being correct), do you divide the total number of rounds fired by the number of stoppages? In this case, it'd be a MRBF of 3,080 since it was 1 stoppage. The wording of FBI handgun reliability requirements mentions it must have "no more than 1 stoppage in 2000 rounds, or 2000 MRBF", which sounds like this formula.
Could someone more mathematically inclined than I confirm one way or the other for me? Thanks.
I have a Glock 19 Gen 4 with 3,080 rounds through it. It has had one stoppage on an extended magazine.
Do you stick the stoppage in the middle of the round count? In that case it'd be dividing 3,080 by 2, which would be 1,540.
Or (and this is what I'm leaning towards being correct), do you divide the total number of rounds fired by the number of stoppages? In this case, it'd be a MRBF of 3,080 since it was 1 stoppage. The wording of FBI handgun reliability requirements mentions it must have "no more than 1 stoppage in 2000 rounds, or 2000 MRBF", which sounds like this formula.
Could someone more mathematically inclined than I confirm one way or the other for me? Thanks.