WOW!!! I "owe" ya, Dutch (Is it "Matt"?)!
You're right, there was a practically unnoticeable little circle on the rifle's "lever boss". The "99" was so faint it did NOT even "show", but there was a distingushable letter stamped against the right side of the inside of the circle. From the position of the letter, it was obvious that SOMETHING had been stamped in front of the letter. Therefore, it appears your information is correct. I just wish I knew whether this "system" was started in 1948 or 1949, then I could get the "exact" year my rifle was manufactured.
I can't believe how accurate my Model 99 is!!! If someone had told me any "lever-action" rifle could shoot as accurately as mine does, I wouldn't have believed them!
I do lot of bench-rest shooting for my own gratification (not in competition) and even though my Model 99 has a lousy trigger (creepy, grindy and about 7 lbs.), the rifle is amazingly accurate for a rifle with a "sporter-weight" 24-inch barrel. Are all Model 99's unusually accurate??? I've been around guns for more than 40 years, and I have never heard that this particular model of rifle "noted" for it's accuracy, but mine sure is a "shooter"!!!
I'd have the trigger "worked on" if I felt "comfortable" with any of the gunsmiths in the area where I live, but... I don't know any of them that I'd trust with the rifle. And... I absolutely REFUSE to ship it anywhere for fear it would be damaged or stolen, so I'm stuck with the trigger. But that's ok... the rifle shoots quite accurately, but it takes a lot of concentration to make that happen. However, in a hunting scenario, who worries about having a 2 lb. trigger? Hahahahaha....
Using 41.5 grains of IMR4895 (the "maximum" listed load) behind a Nosler Ballistic Tip, boat-tailed 150 grain bullet in Winchester cartridge cases ignited by standard Winchester large rifle primers, I have fired a good many 3-shot groups off the bench rest. The groups have averaged .75-inches (3/4 of an inch) measuring the bullet holes "center-to-center". The best group with this load measured a mere .3125-inches (5/16ths of an inch). All groups were fired at 100 yards off a solid concete bench rest using a 3x-9x Bushnell variable scope set on "9x", a heavy, cast-aluminum Hoppes rifle rest and 4 sandbags.
While I was "working up" my hunting load (41.5 grains/IMR4895 giving an average chronographed muzzle velocity of 2664 fps), I got a 3-shot group that measured an unbelievable .1875-inches (3/16ths of an inch) using 41.0 grains of IMR4895. With 41.2 grains, the 3-shot group measured just .375 inches or 3/8ths of an inch... so I "know" I'm in the "sweet spot" for this powder/bullet/case/primer/bullet-seating depth combination. This load may NOT be "safe" in your rifle. You should work up slowly and carefully to determine the maximum safe load in your individual rifle.
In their latest Reloading Manual, Lyman indicates that 42.0 grains of Hodgdon's Varget rifle powder achieved a muzzle velocity of 2740 fps using a 150 grain bullet with a chamber pressure of only 43,000 C.U.P. (SAAMI average pressure = 46,000 C.U.P.) and was Lyman's suggested "accuracy load". WOW... whatta combination... 80 fps faster than my best load of IMR4895 and the suggested "accuracy load" too!!! How can ya beat THAT?!? Just a few nights ago, I loaded up 33 rounds (11 different loads @ 3 rounds each for determining "group" sizes) of Varget... I'm going to find out if the Varget powder will give the high velocity numbers and the fine accuracy as well. This load may NOT be safe in another rifle. Naturally, one must work up the loads to maximum pressure very carefully, checking for all pressure signs constantly.
Naturally, I used all the "accuracy tricks" to modify the twice-fired Winchester cartridge cases. I do all the "accuracy tricks" to every one of my cartridge cases... it takes a little time, but by doing everything I can to make the cases give me their maximum accuracy (aka "consistency"), any deviation from maximum accurate has to be caused by the shooter ("me" in this case) or the rifle. However, the extra effort shows up in the size of the groups one gets.
My heavy barreled Sako in .222 Remington has given me a 5 shot group @ 100 yards as small as .086-inches... yep, that's right... LESS than 1/10th of an inch!!! In fact, while shooting THAT particular "group", the first four bullets went into the SAME .224" hole! Unfortunately, I am the one who goofed up "THE PERFECT GROUP" which is, of course, five shots through the SAME, bullet-diameter-sized hole! This particular group had a maximum outside measurement of .31 inches. By substracting the bullet diameter used in shooting the group (.224" in this case), the size of the group is very easy to determine. When you get into very, very small groups, that's the ONLY way to measure the group-size. It's just too difficult to determine the "center" of 5 different bullet holes when all the bullets made just one relatively small hole on the target.
That MV is almost 100 fps faster than any maximum load I've ever seen from ANY rifle powder in my .300 Savage using 150 grain Nosler Ballistic Tip Bullets. While working up my hunting load and figuring out which rifle powder/primer combination my individual rifle "liked" best, I also worked up loads (to maximuim suggested pressure) of IMR3031 and IMR4064, but neither powder gave me the velocity combined with accuracy that 41.5 grains of IMR4895 (the listed "maximum" load for this powder) gave me in my rifle.
Ok....ok... okkkkkkkkkk... I know you're wondering what that letter was, eh? Hahahahahaha.......... it was an "E" (looked EXACTLY like that "E", too)... indicating my rifle was manufactured in either 1952 or 1953.
Could I ask another favor, Dutch? What is the site address of that "Savage Collector's Forum" you mentioned in your post? I'd like to take a look at it. I'm a Model 99 Savage "enthusiast" as well! Who wouldn't LOVE such a fine, accurate, "classic" rifle deer rifle?!?!?!?
Thanx again for your help, Dutch... I "owe" you BIG TIME!!!
Good shooting!
Strength & Honor, my friend.......
Ron T.