Need load data for 75 gr A-MAX

[Santa Cruz Armory]

I need load data for loading 75 gr A-MAX bullets with Wicnchester 748 powder. I'll be using CCI 450 magnum primers and NATO brass. I'm shooting these in a 24" 1:9 twist barrel.

I know these will be too long to fit in the magazine so I'll be single loading. If anyone can, could they provide the maximum load, etc.

Thanks!!

[ar15barrels]

This is not load data, so use it only as a guideline before you work up your own loads...

Cartridge          : .223 Rem. (SAAMI)
Bullet             : .224, 75, Hornady A-MAX 22792
Cartridge O.A.L. L6: 2.400 inch or 60.96 mm
Barrel Length      : 24.0 inch or 609.6 mm

Predicted Data for Indicated Charges of the Following Powders.

Matching Maximum Pressure: 55000 psi, or 379 MPa

or a maximum loading ratio or filling of 105 %

These calculations refer to your specified settings in QuickLOAD 'Cartridge Dimensions' window.
C A U T I O N : any load listed can result in a powder charge that falls below minimum suggested
loads or exceeds maximum suggested loads as presented in current handloading manuals. Understand
that all of the listed powders can be unsuitable for the given combination of cartridge, bullet
and gun. Actual load order can vary, depending upon lot-to-lot powder and component variations.
USE ONLY FOR COMPARISON !

65 loads produced a Loading Ratio below user-defined minimum of 80%. These powders have been skipped.

Powder type          Filling/Loading Ratio  Charge    Charge   Vel. Prop.Burnt P max  P muzz  B_Time
                                      %     Grains    Gramm   fps     %       psi     psi    ms
---------------------------------  -----------------------------------------------------------------
SNPE Vectan SP 11                  104.8     26.9     1.74    2954    98.1    55000    9483   1.110  !DANGEROUS LOAD-DO NOT USE!
IMR 3031                            99.7     23.7     1.53    2946   100.0    55000    8398   1.115  !DANGEROUS LOAD-DO NOT USE!
IMR 4895                           101.4     24.6     1.60    2941    99.3    55000    8912   1.101  !DANGEROUS LOAD-DO NOT USE!
Winchester 748                      93.8     25.1     1.62    2939    99.6    55000    8900   1.114  !DANGEROUS LOAD-DO NOT USE!
Norma 203B                         102.2     25.4     1.64    2932    98.2    55000    9212   1.123  !DANGEROUS LOAD-DO NOT USE!
Alliant Reloder-15                 101.6     25.2     1.63    2929    97.7    55000    9216   1.124  !DANGEROUS LOAD-DO NOT USE!
Raufoss RA11                       101.6     25.2     1.63    2929    97.7    55000    9216   1.124  !DANGEROUS LOAD-DO NOT USE!
SNPE Vectan Sp 7                   101.6     27.0     1.75    2923    97.8    55000    9246   1.121  !DANGEROUS LOAD-DO NOT USE!
Accurate No.2520                    95.7     25.3     1.64    2918    99.9    55000    8695   1.133  !DANGEROUS LOAD-DO NOT USE!
Accurate XMR 2495                  100.8     23.9     1.55    2916   100.0    55000    8298   1.155  !DANGEROUS LOAD-DO NOT USE!
Hodgdon BL-C2                       94.5     25.5     1.65    2915    99.1    55000    8987   1.128  !DANGEROUS LOAD-DO NOT USE!
Vihtavuori N550                    105.0     27.2     1.76    2911    96.0    51656    9700   1.144  ! Near Maximum !

[rksimple]

Push 'em fast and they should do well for you. I've only used them with varget and some other slower ball powders, but it looks like 748 should do you well.

[Santa Cruz Armory]

Well, I'm gonna try 21 & 22grs of 748 with a CCI 450 primer. We'll see how that does.

If anyone has another load, post it up.

[savage1]

Here's a few I found off load data

75 Hornady A-Max or BTHP Winchester W-748 20.2 2200 fps
75 Hornady A-Max or BTHP Winchester W-748 20.9 2300 fps
75 Hornady A-Max or BTHP Winchester W-748 21.7 2400 fps
75 Hornady A-Max or BTHP Winchester W-748 22.5 2500 fps
75 Hornady A-Max or BTHP Winchester W-748 23.3 2600 fps
75 Hornady A-Max or BTHP Winchester W-748 24.0 2700 fps

Start low and work up. These are not my loads so use wisely.

[ar15barrels]

Here's a few I found off load data

75 Hornady A-Max or BTHP Winchester W-748 20.2 2200 fps
75 Hornady A-Max or BTHP Winchester W-748 20.9 2300 fps
75 Hornady A-Max or BTHP Winchester W-748 21.7 2400 fps
75 Hornady A-Max or BTHP Winchester W-748 22.5 2500 fps
75 Hornady A-Max or BTHP Winchester W-748 23.3 2600 fps
75 Hornady A-Max or BTHP Winchester W-748 24.0 2700 fps

Start low and work up. These are not my loads so use wisely.

Seating length?

[savage1]

this is what was listed, But I do not think it is correct because they have coal as 2.250 and I don't think the 75 gr amax will work that short??
223 Remington Service Rifle Data (Hornady Handbook of Cartridge Reloading 7th Edition)

Warning! Notes: rifle: Colt AR-15, Citadel Bbl; barrel: 20", 1 in 9" twist; case: Winchester; primer: Winchester WSR; bullet diameter: 0.224"; maximum COL: 2.250"; max case length: 1.760"; case trim length: 1.750"
Be Alert: Publisher cannot be responsible for errors in published load data.

Wt. Bullet Powder Manufacturer Powder Charge Velocity (FPS)

75 Hornady A-Max or BTHP IMR IMR-3031 18.6 2200

75 Hornady A-Max or BTHP IMR IMR-3031 19.2 2300

75 Hornady A-Max or BTHP IMR IMR-3031 19.9 2400

75 Hornady A-Max or BTHP IMR IMR-3031 20.5 2500

75 Hornady A-Max or BTHP IMR IMR-3031 21.2 2600
Remarks: maximum load

75 Hornady A-Max or BTHP Accurate AAC-2495 18.2 2200

75 Hornady A-Max or BTHP Accurate AAC-2495 19.1 2300

75 Hornady A-Max or BTHP Accurate AAC-2495 20.0 2400

75 Hornady A-Max or BTHP Accurate AAC-2495 20.9 2500

75 Hornady A-Max or BTHP Accurate AAC-2495 21.8 2600
Remarks: maximum load

75 Hornady A-Max or BTHP Vihtavuori VV-N135 19.8 2200

75 Hornady A-Max or BTHP Vihtavuori VV-N135 20.3 2300

75 Hornady A-Max or BTHP Vihtavuori VV-N135 20.8 2400

75 Hornady A-Max or BTHP Vihtavuori VV-N135 21.3 2500

75 Hornady A-Max or BTHP Vihtavuori VV-N135 21.8 2600
Remarks: maximum load

75 Hornady A-Max or BTHP Accurate AAC-2520 18.6 2200

75 Hornady A-Max or BTHP Accurate AAC-2520 19.6 2300

75 Hornady A-Max or BTHP Accurate AAC-2520 20.5 2400

75 Hornady A-Max or BTHP Accurate AAC-2520 21.5 2500

75 Hornady A-Max or BTHP Accurate AAC-2520 22.5 2600
Remarks: maximum load

75 Hornady A-Max or BTHP Hodgdon H-4895 19.3 2200

75 Hornady A-Max or BTHP Hodgdon H-4895 20.1 2300

75 Hornady A-Max or BTHP Hodgdon H-4895 20.9 2400

75 Hornady A-Max or BTHP Hodgdon H-4895 21.7 2500

75 Hornady A-Max or BTHP Hodgdon H-4895 22.5 2600

75 Hornady A-Max or BTHP Hodgdon H-4895 23.3 2700
Remarks: maximum load

75 Hornady A-Max or BTHP Alliant RL-15 20.0 2200

75 Hornady A-Max or BTHP Alliant RL-15 20.8 2300

75 Hornady A-Max or BTHP Alliant RL-15 21.7 2400

75 Hornady A-Max or BTHP Alliant RL-15 22.5 2500

75 Hornady A-Max or BTHP Alliant RL-15 23.3 2600

75 Hornady A-Max or BTHP Alliant RL-15 24.1 2700
Remarks: maximum load

75 Hornady A-Max or BTHP Winchester W-748 20.2 2200

75 Hornady A-Max or BTHP Winchester W-748 20.9 2300

75 Hornady A-Max or BTHP Winchester W-748 21.7 2400

75 Hornady A-Max or BTHP Winchester W-748 22.5 2500

75 Hornady A-Max or BTHP Winchester W-748 23.3 2600

75 Hornady A-Max or BTHP Winchester W-748 24.0 2700
Remarks: maximum load

75 Hornady A-Max or BTHP Hodgdon Varget 19.4 2200

75 Hornady A-Max or BTHP Hodgdon Varget 20.4 2300

75 Hornady A-Max or BTHP Hodgdon Varget 21.5 2400

75 Hornady A-Max or BTHP Hodgdon Varget 22.5 2500

75 Hornady A-Max or BTHP Hodgdon Varget 23.5 2600
Remarks: maximum load

75 Hornady A-Max or BTHP Vihtavuori VV-N140 20.0 2200

75 Hornady A-Max or BTHP Vihtavuori VV-N140 20.9 2300

75 Hornady A-Max or BTHP Vihtavuori VV-N140 21.8 2400

75 Hornady A-Max or BTHP Vihtavuori VV-N140 22.7 2500

75 Hornady A-Max or BTHP Vihtavuori VV-N140 23.6 2600
Remarks: maximum load

75 Hornady A-Max or BTHP Vihtavuori VV-N540 20.6 2200

75 Hornady A-Max or BTHP Vihtavuori VV-N540 21.4 2300

75 Hornady A-Max or BTHP Vihtavuori VV-N540 22.1 2400

75 Hornady A-Max or BTHP Vihtavuori VV-N540 22.9 2500

75 Hornady A-Max or BTHP Vihtavuori VV-N540 23.6 2600
Remarks: maximum load

75 Hornady A-Max or BTHP Hodgdon BL-C(2) 21.2 2200

75 Hornady A-Max or BTHP Hodgdon BL-C(2) 22.0 2300

75 Hornady A-Max or BTHP Hodgdon BL-C(2) 22.8 2400

75 Hornady A-Max or BTHP Hodgdon BL-C(2) 23.6 2500

75 Hornady A-Max or BTHP Hodgdon BL-C(2) 24.4 2600

75 Hornady A-Max or BTHP Hodgdon BL-C(2) 25.2 2700
Remarks: maximum load