John,
I believe the standard factory loading of the the 218bee is very similar to handloaded .22k hornet ballistics. I have a straight .22 hornet, I should say, my brother does. The main reason people here go to the "k" chambering is not so much for the extra couple of grains gained, but the extended case life and better extraction of the K hornet!
Some load info I have on file from "the reload bench" and other sources... This is just as an informative guide. I have not loaded for these cartridges as yet myself...
cheers,
Cam....
*218 Mashburn Bee
Historical Notes:
The 218 Mashburn Bee is an improved version of the factory 218 Bee. Cases are made by firing factory ammunition in the Mashburn chamber, so no special case forming dies are required. The cartridge was the work of A. E. Mashburn of the Mashburn Arms Company in Oklahoma City, Oklahoma. As near as can be determined, the cartridge originated in about 1940 or thereabouts. The improved case produced better ballistics than the original Bee and also offered longer case life when reloaded. There are other Improved versions of the 218 Bee, but they are all pretty much alike. The Mashburn Bee will deliver about the same velocity with the 55 grain bullet as the factory Bee delivers with the 45 grain bullet.
General Comments:
The Mashburn Bee was fairly popular until the advent of the 222 Remington. It was, and still is, a very accurate varmint cartridge. The best powders for loading these small cartridges are IMR-4198 and IMR-4227.
Source: Cartridges of the World
218 Mashburn Bee Reloading Data
Bullet (grs.) Powder / (grs.) MV ME Source
40HP IMR-4227 / 16.5 3300 960 n/a
45SP IMR-4227 / 16.3 3319 1100 Ackley
50SP IMR-4198 / 17.3 3300 1210 Ackley
*The 22 K-Hornet
Historical Notes:
Originated by Lysle Kilbourn in 1940, this was one of the first of the so called "improved" cartridges. It is based on the fire formed and blown out of the22Hornet case with a straight body, sharp shoulder and short neck. There are other versions, but this is the most popular and is representative of the lot. It has been used for a good many years and is still popular in varmint shooting circles. Extensive experience with this cartridge in the Thompson Contender show fairly substantial improvements over the 22 Hornet. The popularity of the 22 K-Hornet was based on increased performance, plus the fact that any regular factory loaded ammunition could also be fired in the same chamber. In addition, the conversion is quite cheap, and any Hornet rifle can be rechambered. Ammunition is no problem because the round is based on easily obtainable factory ammunition. It brings the 22 Hornet into the same class as the 218 Bee with the added advantage that the 22 hornet was chambered in several good bolt action rifles. It is suitable for the same range of varmints and small game as the 218 Bee. Those lucky enough to find an original Kimber rifle chambered for the 22 K-Hornet can pride themselves in owning a superb rifle.
Reloading data:
These are some of my favorite loads for the 22K-hornet in both the TC Contender and the Ruger M77/22 K-hornet. I would like to mention that I would try small pistol primers with the K-hornet reloads if your current load is not yielding the accuracy you expect.
All loads listed should be approached very carefully using normal reloading procedures, remember when reloading data on the web is considered, be sure to look at a RELOADING MANUAL first.
22 K-hornet Reloading Data
Bullet (grs.) Powder / (grs.) MV ME Source
45 SP IMR 4227 / 12.5 2875 825
45 SP 2400 / 11.5 2900 840 Ackley
45 IMR 4198 / 14.5 2800 780 Ackley
50 SP 2400 / 11.0 2700 810 Ackley
35 Vmax H110 / 11
52 HP Lil'Gun / 13.5
45 SP WW296 / 11.5 2650
45 SP AA1680 / 13.3 2525
45 SP H4227 / 11.4 2500
40 Vmax Lil'Gun / 14.0 2875
45 SP AA-9 / 9.0 2375
(Reduced load)
Any 40 -45 Bullseye / 3.5 1600