Does anyone have any information on the 224 BOZ as far as case dimensions and reloading data? If you have never heard of the round checkout the link below.

http://www.civil-defence.org/products/ballistics/boz224/boz224.html

I remember reading an article on the 224 BOZ in a Guns&Ammo mag like 6 or 7 years ago. They were shooting though armoured helmets and vests with it. Not sure if it had load data though, I still got the magazine...

The following data is from AccuLoad ( AEM Enterprises )

Rim Diameter: 0.4250"
Rim Length: 0.0500"
Extractor Groove: 0.3430"
Extractor Groove Length: 0.0920"
Base Bevel: 0.1290"
Base Diameter: 0.4250"
Shoulder Diameter: 0.4250"
Head to Shoulder Length: 0.6230"
Neck Diameter: 0.2540"
Head to Neck Length: 0.7580"
Mouth Outside Diameter: 0.2540"
Mouth Inside Diameter: 0.2240"
Maximum Case Length: 0.9060"
Minimum Case Length: 0.8960"
Trimmed Case Length: 0.9010"
Maximum Overall Length: 1.283"
SAAMI Maximum Average Pressure: 37,500 psi

Tell me the bullets you are interested in using and I will share suggested loads generated by AEM's latest version of LoadTech, which is now in beta testing (a very interesting load program that uses a unique mathematical model for each different powder, and doesn't use any of the old Powley stuff ... also does an excellent job with pistol cartridges).

GunGeek,

Does that software happen to generate a dimensioned image of the cartridge? Can you post if it does. Also, do you have the shoulder angle?

I don't have anything that fires this round...yet. One more thing on my TO DO list. I'll probably have a barrel made for my TC Encore before seeing about having an autoloader modified for this round. Talk about the ultimate Varmint handgun!

I really wish they would hurry up and get this round over here in the States. It's only a matter of time though. It can't stay a military/police round forever.

jcsabolt-2,
In the single shot pistol forum there is a dimensioned drawing of the .224 BOZ under a post of the same name. Sean

jcsabolt-2,

AccuLoad does have dimensional drawings for all of the cartridges in its database, but it sounds like you have already located another source.

This is a small sample of some of the loads for the .224 Boz generated by the alpha version of LoadTech that I am testing for AEM. I need to quote from LoadTech: �WARNING! These loads have not been tested. Work up to maximums with extreme caution.� I have included the start and max loads, and the start and max velocities. The asterisks indicate compressed loads. This is only a very small part of the data produced by LoadTech.

Based on these figures, this does sound like it would make the �ultimate varmint handgun�.

Hornady .224 40 gr BTSP V-Max

Alliant Unique � 9.0 � 10.0 gr � 2080 � 2205 fps
IMR 7625 � 5.3 � 5.8 gr � 1830 � 1950 fps
Alliant Bullseye � 8.9 � 9.9 gr � 2350 � 2485 fps
Alliant 2400 � 11.3 � 12.6 gr � 2410 � 2545 fps
IMR 4227 � 8.8 � 9.8 gr � 2260 � 2395 fps
ADI AR2207 � 11.7 � 13.0 gr � 2780 � 2930 fps
Accurate XMR-2015 � 16.0 � 16.9* gr � 2785 � 2870 fps
Hodgdon H322 � 17.5* � 17.6* gr � 2880 � 2890 fps

Sierra .224 45 gr SPT Varminter

Alliant Herco � 10.1 � 11.3 gr � 2130 � 2260 fps
Alliant Unique � 8.4 � 9.4 gr � 2045 � 2170 fps
Alliant Bullseye � 8.5 � 9.5 gr � 2295 � 2430 fps
Accurate No. 5 � 15.1 � 16.8 gr � 2320 � 2445 fps
Alliant 2400 � 9.3 � 10.3 gr � 2335 � 2470 fps
IMR 4227 � 8.4 � 9.3 gr � 2155 � 2285 fps
ADI AR2207 � 11.6 � 12.9 gr � 2610 � 2760 fps
Accurate XMR-2015 � 15.2 � 16.9* gr � 2735 � 2880 fps
Hodgdon 322 � 17.3 � 18.5* gr � 2775 � 2880 fps
ADI AR2206 � 16.8 � 18.1* gr � 2585 � 2695 fps

Sierra .224 50 gr BlitzKing

Alliant Green Dot � 7.4 � 8.2 gr � 1765 � 1880 fps
Alliant Herco � 10.1 � 10.9 gr � 2160 � 2260 fps
Hodgdon HP-38 � 5.9 � 6.5 gr � 1510 � 1620 fps
Alliant Unique � 8.2 � 9.1 gr � 2080 � 2205 fps
Alliant Bullseye � 8.1 � 9.0 gr � 2240 � 2370 fps
Accurate No. 5 � 13.0 � 14.4 gr � 1975 � 2095 fps
Alliant 2400 � 9.5 � 10.6 gr � 2215 � 2340 fps
IMR 4227 � 8.0 � 8.9 gr � 2025 � 2145 fps
ADI AR2207 � 10.7 � 11.9 gr � 2540 � 2685 fps
Accurate XMR-2015 � 14.7 � 16.4* gr � 2595 � 2735 fps
Hodgdon H322 � 16.8 � 17.6* gr � 2655 � 2720 fps
ADI AR2206 � 16.2 � 17.2* gr � 2450 � 2540 fps

Speer .224 55 gr FBSP

Alliant Green Dot � 6.5 � 7.3 gr � 1710 � 1820 fps
ADI AP-70N � 5.4 � 6.0 gr � 1515 � 1620 fps
Alliant Herco � 9.5 � 10.5* gr � 2150 � 2275 fps
Hodgdon HP-38 � 5.3 � 5.9 gr � 1445 � 1550 fps
Alliant Unique � 7.7 � 8.5 gr � 2065 � 2185 fps
Alliant Bullseye � 7.6 � 8.4 gr � 2175 � 2300 fps
Accurate No. 5 � 11.8 � 13.2 gr � 1805 � 1915 fps
Alliant 2400 � 8.7 � 9.7 � 2120 � 2245 fps
IMR 4227 � 7.6 � 8.5 gr � 1910 � 2045 fps
Accurate XMR-2015 � 14.1 � 15.7 gr � 2490 � 2625 fps
Hodgdon H322 � 16.5 � 17.6* gr � 2540 � 2640 fps
ADI AR2206 � 15.1 � 16.8* gr � 2375 � 2505 fps
ADI BM1 � 19.2* - 19.8* gr � 2690 � 2745 fps

Nosler .224 60 gr FBSP-P

Alliant Red Dot � 7.3 � 8.1* gr � 1595 � 1700 fps
Alliant Green Dot � 5.9 � 6.5 gr � 1700 � 1810 fps
Alliant Unique � 8.2 � 9.1 gr � 2315 � 2445 fps
Alliant Bullseye � 7.5 � 8.4 gr � 2280 � 2410 fps
Alliant 2400 � 9.5 � 10.5 gr � 1990 � 2105 fps
IMR 4227 � 7.4 � 8.3 gr � 1780 � 1890 fps
Accurate XMR-2015 � 13.8 � 15.3* gr � 2340 � 2470 fps
Hodgdon H322 � 15.8* - 16.2* � 2415 � 2450 fps
ADI AR2206 � 15.2* - 15.8 gr � 2205 � 2260 fps

Hornady .224 68 gr BTHP Match

Alliant Red Dot � 7.1 � 7.7* gr � 1665 � 1740 fps
Allaint 2400 � 9.4 � 10.5 gr � 1810 � 1920 fps
IMR 4227 � 7.2 � 8.0 gr � 1600 � 1700 fps
Accurate XMR-2015 � 13.4 � 14.1* gr � 2155 � 2215 fps
ADI BM1 � 15.7 � 16.6* gr � 2320 � 2390 fps

I hope this helps.

By the way, these figures are based on an overall cartridge length of 1.283" and barrel length of 14".

GunGeek,

What no L'ilGun?

Very interesting data, albeit untried...

I read something about the BOZ awhile back; I believe the author said ATF had deemed it to have "no sporting purpose" and that it would not be released in the civilian world.

Dunno if that's true or not, and can't remember the name of the writer.

BigIron

You might be referring to firearms but the cartridge is another matter entirely. One could simply neck down a 10mm and drive on. Call it the .224 Hornet rimless short or some such.

Hobie,

Good question about Hodgdon Lil'Gun. I had the same question about Hodgdon H110. I asked the computer guru at AEM and here is the answer I got, as best as I understand it:

The version of LoadTech that is currently being tested contains computer models for 112 powders from Accurate, ADI, Alliant, Hodgdon, IMR, Ramshot and VihtaVouri. When the product is released in the early fall it will contain about 175 powders, adding powders from Norma, Rex, Somchem, Thunderbird, Vectan and Winchester.

According to them, the other load estimation programs use about a half dozen parameters, and base their estimates on a theoretical model, the same model for all powders.

LoadTech bases its load estimates on up to 40 different parameters. They develop a completely unique model for each individual powder. The model for a single powder is based on an empirical analysis of up to 10,000 data elements. The models for the 112 powders currently in LoadTech were based on about 15 months of data analysis.

Included with the estimates for each load is the confidence that the model has in it's estimate of the maximum load and the maximum velocity. The confidence (or accuracy of the estimates compared with actual load test results) is typically 98-99% or higher.

If the confidence of the estimate for a particular load (based on the 40 parameters in the model for that powder) is less than about 95%, then LoadTech rejects the load. In the case of Hodgdon Lil'Gun and H110 with this particularly cartridge and combination of components, LoadTech just doesn't have enough confidence in it's estimates (based on comparisons with real life tests) to risk displaying a suggested load.

It kind of makes sense to me. Does it make sense to you?

Here is an image....