Dan,

The bullet isn't long enough for that COAL. It would be completely out of the case. Although, QuickLOAD's bullet database isn't always correct. It's best to measure a bullet and overwrite the defaults. I don't suppose you happen to have bullets cast from that particular mold that you could measure?

At a COAL of 1.680" QL shows a seating depth of 0.620 (so fairly deeply seated). The .30 Carbine appears to have a neck length of right around 0.308". So with 100% neck tension that would give you a COAL of 1.992". Going as low as 75% neck tension (my personal minimum) would give you a COAL of 2.070".

And I can't completely take the minimum load density out of the equation as 29% is lowest allowed.

***USE THIS DATA AT YOUR OWN RISK***

Code
Cartridge          : .30 Carbine
Bullet             : .309, 180, LEE C309-180-R
Useable Case Capaci: 16.677 grain H2O = 1.083 cm�
Cartridge O.A.L. L6: 2.070 inch = 52.58 mm
Barrel Length      : 18.0 inch = 457.2 mm

Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 40610 psi, or 280 MPa
or a maximum loading ratio or filling of 110 %
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 !

Powder type          Filling/Loading Ratio  Charge    Charge   Vel. Prop.Burnt P max  P muzz  B_Time
                                      %     Grains    Gramm   fps     %       psi     psi    ms
---------------------------------  -----------------------------------------------------------------
Winchester 296                      86.2     14.2     0.92    1711    98.8    40611    3445   1.273  ! Near Maximum !
Hodgdon Lil'Gun                     87.3     13.9     0.90    1690   100.0    40611    3012   1.272  ! Near Maximum !
Ramshot X-Terminator               109.7     18.1     1.17    1685    87.9    40611    3614   1.265  ! Near Maximum !
Alliant Reloder- 7                 108.5     16.1     1.05    1678    94.6    40611    3392   1.275  ! Near Maximum !
Hodgdon H110                        86.8     14.3     0.93    1671    99.7    40611    3168   1.288  ! Near Maximum !
Hodgdon H4227                      101.9     14.3     0.93    1654    97.6    40611    3153   1.274  ! Near Maximum !
Vihtavuori N120                    110.0     15.4     1.00    1644    98.3    36811    3205   1.308
Accurate 1680                       95.1     15.7     1.02    1641    90.5    40611    3259   1.285  ! Near Maximum !
Hodgdon H335                       110.0     18.5     1.20    1638    84.4    38732    3535   1.301
Accurate 2200                      107.2     16.7     1.08    1634    85.5    40611    3293   1.287  ! Near Maximum !
Accurate 5744                       91.9     13.2     0.86    1633    94.8    40611    3188   1.289  ! Near Maximum !
IMR 4227                           100.0     14.1     0.91    1632    96.7    40611    3066   1.285  ! Near Maximum !
Vihtavuori N110                     96.9     12.6     0.82    1626   100.0    40611    2699   1.296  ! Near Maximum !
IMR 4198                           110.0     15.2     0.98    1623    93.5    37852    3230   1.309
Hodgdon H4198                      106.9     15.4     1.00    1609    88.2    40611    3079   1.297  ! Near Maximum !
Ramshot Enforcer                    78.6     12.3     0.80    1608   100.0    40611    2628   1.307  ! Near Maximum !
Accurate 4100                       81.5     12.9     0.84    1606   100.0    40611    2708   1.305  ! Near Maximum !
Alliant 2400                        78.7     11.5     0.74    1605   100.0    40611    2632   1.305  ! Near Maximum !
Alliant Reloder-10x                110.0     16.0     1.03    1590    90.1    31169    3415   1.393
Accurate No.9                       69.2     11.4     0.74    1563   100.0    40611    2415   1.319  ! Near Maximum !
Alliant BLUE DOT                    81.8     10.2     0.66    1537   100.0    40611    2284   1.328  ! Near Maximum !
Vihtavuori N130                    110.0     15.8     1.02    1534    89.1    30736    3102   1.423
Accurate No.7                       62.5     10.4     0.67    1533   100.0    40611    2226   1.334  ! Near Maximum !
Accurate 2015                      110.0     16.4     1.06    1529    86.8    28125    3249   1.458
Vihtavuori N105                     81.0      9.7     0.63    1492   100.0    40611    1998   1.357  ! Near Maximum !
Vihtavuori 3N38                     77.5      9.7     0.63    1480   100.0    40611    1987   1.356  ! Near Maximum !
Alliant POWER PISTOL                66.8      8.2     0.53    1479   100.0    40611    2053   1.354  ! Near Maximum !
Accurate No.5                       50.8      8.8     0.57    1463   100.0    40611    1965   1.360  ! Near Maximum !
Hodgdon HS-6                        55.9      8.5     0.55    1383   100.0    40611    1665   1.409  ! Near Maximum !
Vihtavuori 3N37                     68.5      8.1     0.53    1373   100.0    40611    1646   1.419  ! Near Maximum !
Hodgdon Longshot                    53.2      8.2     0.53    1366   100.0    40611    1614   1.420  ! Near Maximum !
Ramshot True Blue                   52.7      8.2     0.53    1364   100.0    40611    1608   1.421  ! Near Maximum !
Winchester 540                      51.9      8.2     0.53    1363   100.0    40611    1605   1.422  ! Near Maximum !
Vihtavuori N350                     71.2      8.0     0.52    1363   100.0    40611    1606   1.424  ! Near Maximum !
Alliant HERCO                       77.3      7.5     0.48    1358   100.0    40611    1621   1.431  ! Near Maximum !
Winchester WAP                      57.1      7.6     0.49    1333   100.0    40611    1534   1.443  ! Near Maximum !
Ramshot Silhouette                  56.9      7.6     0.49    1331   100.0    40611    1527   1.445  ! Near Maximum !
Alliant UNIQUE                      69.1      6.9     0.44    1328   100.0    40611    1530   1.451  ! Near Maximum !
Alliant BULLSEYE                    61.3      6.2     0.40    1325   100.0    40611    1546   1.448  ! Near Maximum !
Accurate No.2                       51.1      6.6     0.43    1294   100.0    40611    1409   1.468  ! Near Maximum !
Vihtavuori N340                     68.1      6.9     0.45    1292   100.0    40611    1401   1.474  ! Near Maximum !
Hodgdon Universal                   64.9      6.4     0.42    1264   100.0    40611    1357   1.502  ! Near Maximum !
Vihtavuori N330                     64.5      6.5     0.42    1250   100.0    40611    1301   1.515  ! Near Maximum !
Accurate Solo 1250                  70.1      6.4     0.42    1243   100.0    40611    1273   1.514  ! Near Maximum !
Winchester 231                      56.2      6.5     0.42    1239   100.0    40611    1281   1.518  ! Near Maximum !
Ramshot Zip                         50.2      6.5     0.42    1239   100.0    40611    1281   1.518  ! Near Maximum !
Hodgdon HP38                        55.1      6.4     0.42    1231   100.0    40611    1261   1.524  ! Near Maximum !
Accurate Nitro 100                  68.5      5.5     0.36    1220   100.0    40611    1271   1.536  ! Near Maximum !
Alliant GREEN DOT                   69.1      5.9     0.38    1217   100.0    40611    1243   1.540  ! Near Maximum !
Vihtavuori N320                     64.7      5.8     0.38    1199   100.0    40611    1176   1.559  ! Near Maximum !
Accurate Solo 1000                  68.5      5.8     0.38    1198   100.0    40611    1194   1.554  ! Near Maximum !
Alliant RED DOT                     71.4      5.5     0.35    1193   100.0    40611    1197   1.563  ! Near Maximum !
Hodgdon TiteGroup                   47.5      5.9     0.39    1187   100.0    40611    1162   1.565  ! Near Maximum !
Vihtavuori N310                     56.6      5.1     0.33    1130   100.0    40611    1030   1.626  ! Near Maximum !
Hodgdon Clays                       69.1      5.1     0.33    1125   100.0    40611    1037   1.623  ! Near Maximum !


Code
Cartridge          : .30 Carbine
Bullet             : .309, 180, LEE C309-180-R
Useable Case Capaci: 15.209 grain H2O = 0.987 cm�
Cartridge O.A.L. L6: 1.992 inch = 50.60 mm
Barrel Length      : 18.0 inch = 457.2 mm

Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 40610 psi, or 280 MPa
or a maximum loading ratio or filling of 110 %
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 !

Powder type          Filling/Loading Ratio  Charge    Charge   Vel. Prop.Burnt P max  P muzz  B_Time
                                      %     Grains    Gramm   fps     %       psi     psi    ms
---------------------------------  -----------------------------------------------------------------
Winchester 296                      89.2     13.4     0.87    1671    98.2    40611    3199   1.288  ! Near Maximum !
Hodgdon Lil'Gun                     90.5     13.2     0.85    1657   100.0    40611    2817   1.283  ! Near Maximum !
Hodgdon H110                        89.7     13.5     0.87    1633    99.4    40611    2950   1.304  ! Near Maximum !
Hodgdon H4227                      104.8     13.5     0.87    1608    96.6    40611    2904   1.295  ! Near Maximum !
Alliant Reloder- 7                 110.0     14.9     0.97    1604    92.6    38204    3066   1.324
Accurate 1680                       97.8     14.7     0.96    1592    88.9    40611    2972   1.307  ! Near Maximum !
Vihtavuori N110                    100.2     11.9     0.77    1592   100.0    40611    2518   1.310  ! Near Maximum !
IMR 4227                           102.9     13.2     0.86    1587    95.6    40611    2819   1.306  ! Near Maximum !
Accurate 5744                       94.5     12.4     0.80    1587    93.6    40611    2925   1.311  ! Near Maximum !
Ramshot X-Terminator               110.0     16.5     1.07    1585    84.5    37142    3185   1.338
Accurate 2200                      110.0     15.7     1.01    1580    83.6    40611    2981   1.312  ! Near Maximum !
Ramshot Enforcer                    81.2     11.6     0.75    1574   100.0    40611    2451   1.323  ! Near Maximum !
Alliant 2400                        81.3     10.8     0.70    1569   100.0    40611    2454   1.323  ! Near Maximum !
Accurate 4100                       84.1     12.2     0.79    1569    99.9    40611    2524   1.324  ! Near Maximum !
Hodgdon H4198                      109.8     14.5     0.94    1559    86.5    40611    2796   1.322  ! Near Maximum !
Vihtavuori N120                    110.0     14.1     0.91    1553    96.5    33272    2894   1.383
IMR 4198                           110.0     13.8     0.90    1530    90.7    34645    2865   1.383
Accurate No.9                       71.4     10.7     0.69    1529   100.0    40611    2246   1.337  ! Near Maximum !
Alliant BLUE DOT                    84.3      9.6     0.62    1504   100.0    40611    2120   1.347  ! Near Maximum !
Accurate No.7                       64.5      9.7     0.63    1500   100.0    40611    2066   1.352  ! Near Maximum !
Alliant Reloder-10x                110.0     14.6     0.94    1491    86.6    27974    3008   1.479
Vihtavuori N105                     83.8      9.2     0.60    1463   100.0    40611    1853   1.374  ! Near Maximum !
Vihtavuori 3N38                     79.9      9.1     0.59    1449   100.0    40611    1839   1.376  ! Near Maximum !
Alliant POWER PISTOL                68.9      7.7     0.50    1448   100.0    40611    1901   1.373  ! Near Maximum !
Vihtavuori N130                    110.0     14.4     0.93    1440    85.7    27770    2728   1.508
Accurate No.5                       52.3      8.3     0.54    1431   100.0    40611    1817   1.381  ! Near Maximum !
Hodgdon HS-6                        57.5      8.0     0.52    1352   100.0    40611    1535   1.431  ! Near Maximum !
Vihtavuori 3N37                     70.4      7.6     0.49    1344   100.0    40611    1518   1.441  ! Near Maximum !
Hodgdon Longshot                    54.7      7.7     0.50    1336   100.0    40611    1487   1.442  ! Near Maximum !
Ramshot True Blue                   54.2      7.7     0.50    1334   100.0    40611    1481   1.444  ! Near Maximum !
Vihtavuori N350                     73.2      7.5     0.48    1333   100.0    40611    1481   1.447  ! Near Maximum !
Winchester 540                      53.3      7.7     0.50    1333   100.0    40611    1478   1.445  ! Near Maximum !
Alliant HERCO                       79.5      7.0     0.45    1328   100.0    40611    1494   1.454  ! Near Maximum !
Winchester WAP                      58.6      7.1     0.46    1303   100.0    40611    1412   1.467  ! Near Maximum !
Ramshot Silhouette                  58.4      7.1     0.46    1301   100.0    40611    1406   1.469  ! Near Maximum !
Alliant UNIQUE                      71.0      6.4     0.42    1299   100.0    40611    1408   1.475  ! Near Maximum !
Alliant BULLSEYE                    62.8      5.8     0.38    1295   100.0    40611    1422   1.473  ! Near Maximum !
Accurate No.2                       52.4      6.1     0.40    1264   100.0    40611    1293   1.494  ! Near Maximum !
Vihtavuori N340                     69.8      6.5     0.42    1263   100.0    40611    1286   1.500  ! Near Maximum !
Hodgdon Universal                   66.5      6.0     0.39    1235   100.0    40611    1246   1.529  ! Near Maximum !
Vihtavuori N330                     66.1      6.0     0.39    1221   100.0    40611    1194   1.542  ! Near Maximum !
Accurate Solo 1250                  71.8      6.0     0.39    1213   100.0    40611    1166   1.542  ! Near Maximum !
Winchester 231                      57.5      6.1     0.40    1209   100.0    40611    1173   1.546  ! Near Maximum !
Ramshot Zip                         51.3      6.1     0.40    1209   100.0    40611    1173   1.546  ! Near Maximum !
Hodgdon HP38                        56.3      6.0     0.39    1201   100.0    40611    1154   1.553  ! Near Maximum !
Accurate Nitro 100                  69.9      5.1     0.33    1190   100.0    40611    1162   1.566  ! Near Maximum !
Alliant GREEN DOT                   70.6      5.5     0.36    1187   100.0    40611    1137   1.570  ! Near Maximum !
Vihtavuori N320                     66.1      5.4     0.35    1169   100.0    40611    1075   1.589  ! Near Maximum !
Accurate Solo 1000                  69.9      5.4     0.35    1168   100.0    40611    1090   1.585  ! Near Maximum !
Alliant RED DOT                     72.9      5.1     0.33    1162   100.0    40611    1093   1.595  ! Near Maximum !
Hodgdon TiteGroup                   48.4      5.5     0.36    1157   100.0    40611    1061   1.597  ! Near Maximum !
Vihtavuori N32C Tin Star            91.7      6.4     0.42    1102   100.0    40611     923   1.665  ! Near Maximum !
Vihtavuori N310                     57.6      4.7     0.30    1100   100.0    40611     936   1.663  ! Near Maximum !
Hodgdon Clays                       70.1      4.7     0.30    1093   100.0    40611     941   1.662  ! Near Maximum !


Hopefully you can find a safe load that meets your criteria. Don't blow yourself (or your firearm) up. wink


“There are three things all wise men fear: the sea in storm, a night with no moon, and the anger of a gentle man.”
― Patrick Rothfuss, The Wise Man's Fear