05-11-2019, 12:49 PM
Lemonaid Wrote:Found this (a portion only) on wikipedia about the M24 Sniper Weapon System.
My take on it is that Maximum Effective Range as a military standard is only about accuracy. So if you want a Grendel MEF, start with an accepted standard of accuracy and you will be able to calculate or test what it's MEF is.
They were rigorously tested before being approved by Remington and the military.
A U.S. Soldier training with a M24
Accuracy: According to MIL-R-71126(AR), 3.15.7 Targeting and Accuracy, The rifle shall achieve the dispersion set forth below when fired from a Government approved machine rest. The average mean radius shall be less than or equal to the values stated below. The minimum rate of fire for conducting this test shall be three rounds per minute.[3]
Range / Average Mean Radius (AMR) — Mean Radius (MR) expresses the average distance of all the shots from the center of the shot group. AMR averages the MR of several shot groups.
200 yards (183 m): 1.3 inches
273 yards (250 m): 1.4 inches
300 yards (274 m): 1.9 inches
The radial distance from the calculated center of impact of the first target compared to the calculated center of impacts of the subsequent targets shall be less or equal to 1.086 MOA (3.3 inches @ 300 yards, 2.2 inches @ 200 yards, 2.4 inches @ 200 meters) on an average basis.
The actual rifle requirements for accuracy were .35 MOA from a machine rest and according to Major John Mende (ret.) this accuracy had to be maintained to 10,000 rounds. He stated, "Interesting side note was there was a 10,000 round requirement for the barrel to maintain the original accuracy. In fact after some 10,000 round tests we discovered the accuracy improved. A few barrels were tested past 20,000 and accuracy never went below the original accuracy requirement."[8]
Maximum effective range is given as 800 meters (875 yd), but record shots have been made with the M24 at over 1,000 meters (1,094 yd). Meanwhile, the standard optical sight has a maximum elevation adjustment of 1,000 meters (1,094 yd).
Lemonaid:
Take if from a guy who has fired thousands of rounds of M-118 Special Ball out of M-24's. M-14 service and super match, the M-14 EBR, and a couple of Model 70 Match rifles.
I have never seen any of them hold one minute at 300 yards when firing issued M-118 Special Ball. I have seen them hold that when firing M-852 Match. The lots of M-118 LR that I used and witnessed being used were hit or miss in quality at the time they came out so can not comment on them.
As for 800 meters being the max effective range for the M-24 and an average trained Sniper team of the 1980's and 1990's using the 24, a 10X fixed mil dot reticle, M-118 Special Ball, at unknown distances to 1000 meters, I think a 50% chance of a first round hit on a E-Sil at around 800 meters is pretty damn good. The problem is, guys who do not shoot true unknown distance ranges, while laying in the prone, with a spotter in the prone using a M-49 scope, firing M-118, have no clue what so ever of the pure luck that goes into some of the longer shots with that particular equipment that is now obsolete.
I am sure what you cited is a requirement written sometime in the late 70's or early 80's when the 24 was being developed. Sounds right but never quite got there.
Not sure why you even cited this requirement. It reflects the technology of US Army sniping in the late 70's and into the 80's. It is obsolete today.
LR55