Je dois en recharger pour un ami. Je me dirigeais vers la IMR4350 à 65 gr derrièere un Hdy Interlock de 165 gr; 2990 FPS en moyenne qui est bon pour le chevreuil.

Est-ce que certains ont des charges performantes qu'ils ont développés qui pourrait me donner autre choix que mon imagination? Les données sont rares pour ce calibre, mis èa part la vénération des armuriers...

Est-ce que vous connaissez une source de ''once fired'' pour ce caibre?

Merci à tous.

Voiçi une simulation Quickload avec le Hornady 165grs et les poudres performantes pour cette combinaison dans un caonon de 26". Comme toujours, il faut commencer de 7 a 10% en bas du maximum et vérifier constamment pour les signes de pression. Deux paramètres ont été utilisés pour cette simulation:

Max pression pour la 300 H&H: 62366 psi
Densité maximale: 106%

Bonne lecture.

Cartridge : .300 H.& H. Mag.
Bullet : .308, 165, Hornady SST InterLock 30452
Useable Case Capaci: 79.585 grain H2O = 5.167 cm³
Cartridge O.A.L. L6: 3.600 inch = 91.44 mm
Barrel Length : 26.0 inch = 660.4 mm

Predicted Data for Indicated Charges of the Following Powders.

Matching Maximum Pressure: 62366 psi, or 429 MPa

or a maximum loading ratio or filling of 106 %

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 !

59 loads produced a Loading Ratio below user-defined minimum of 90%. 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
--------------------------------- -----------------------------------------------------------------
Norma MRP 103.0 78.9 5.11 3278 99.9 62366 12306 1.146 !DANGEROUS LOAD-DO NOT USE!
Vihtavuori N560 104.8 78.5 5.09 3270 98.0 62366 12583 1.141 !DANGEROUS LOAD-DO NOT USE!
Accurate MAGPRO 105.0 81.9 5.31 3256 96.8 62366 12622 1.149 !DANGEROUS LOAD-DO NOT USE!
IMR 7828 SSC 103.3 77.9 5.05 3254 98.4 62366 12173 1.133 !DANGEROUS LOAD-DO NOT USE!
Raufoss RA15 105.0 77.9 5.05 3245 99.3 62366 12115 1.148 !DANGEROUS LOAD-DO NOT USE!
Bofors RP5/NP ~approximation 105.0 77.9 5.05 3245 99.3 62366 12115 1.148 !DANGEROUS LOAD-DO NOT USE!
Alliant Reloder-22 105.0 77.9 5.05 3245 99.3 62366 12115 1.148 !DANGEROUS LOAD-DO NOT USE!
ADI AR 2213 104.3 77.3 5.01 3237 98.3 62366 12059 1.132 !DANGEROUS LOAD-DO NOT USE!
Ramshot Magnum (Big Boy) 106.0 83.3 5.40 3226 98.5 59852 12275 1.155 ! Near Maximum !
SNPE Vectan SP 12 106.0 83.0 5.38 3216 98.4 59297 12227 1.160 ! Near Maximum !
PB Clermont PCL 517 106.0 83.0 5.38 3210 98.3 58946 12233 1.163 ! Near Maximum !
ADI AR 2209 101.1 73.8 4.78 3201 99.1 62366 11482 1.138 !DANGEROUS LOAD-DO NOT USE!
Rottweil R905 106.0 77.2 5.00 3200 97.9 61986 11775 1.152 !DANGEROUS LOAD-DO NOT USE!
Alliant Reloder-19 101.7 74.6 4.83 3198 99.1 62366 11544 1.146 !DANGEROUS LOAD-DO NOT USE!
Hodgdon H4350 97.0 70.7 4.58 3194 100.0 62366 11018 1.145 !DANGEROUS LOAD-DO NOT USE!
Ramshot Hunter 97.2 73.6 4.77 3192 100.0 62366 11176 1.152 !DANGEROUS LOAD-DO NOT USE!
Winchester 760 91.8 71.2 4.62 3191 99.8 62366 11225 1.154 !DANGEROUS LOAD-DO NOT USE!
Bofors RP14 ~approximation 102.4 75.1 4.87 3190 99.1 62366 11459 1.147 !DANGEROUS LOAD-DO NOT USE!
Winchester WXR 106.0 76.9 4.98 3186 98.8 58745 11988 1.179 ! Near Maximum !
IMR 4350 99.4 69.9 4.53 3181 99.9 62366 10999 1.149 !DANGEROUS LOAD-DO NOT USE!
Somchem S365 98.9 72.2 4.68 3179 100.0 62366 10376 1.162 !DANGEROUS LOAD-DO NOT USE!
Norma 204 96.5 73.1 4.74 3172 99.0 62366 11248 1.147 !DANGEROUS LOAD-DO NOT USE!
Raufoss RA4 99.6 73.1 4.74 3172 99.0 62366 11248 1.147 !DANGEROUS LOAD-DO NOT USE!
Bofors RP4 ~approximation 99.6 73.1 4.74 3172 99.0 62366 11248 1.147 !DANGEROUS LOAD-DO NOT USE!
Norma URP 96.8 70.2 4.55 3170 100.0 62366 10701 1.159 !DANGEROUS LOAD-DO NOT USE!
Vihtavuori N550 94.0 70.5 4.57 3170 100.0 62366 10834 1.163 !DANGEROUS LOAD-DO NOT USE!
Bofors RP19 ~approximation 96.8 70.2 4.55 3170 100.0 62366 10698 1.159 !DANGEROUS LOAD-DO NOT USE!
Hodgdon H4831 SC 102.8 76.3 4.94 3169 97.6 62366 11360 1.144 !DANGEROUS LOAD-DO NOT USE!
Accurate 4350 100.3 70.4 4.56 3165 100.0 62366 10665 1.176 !DANGEROUS LOAD-DO NOT USE!
Somchem S385 101.9 75.6 4.90 3157 99.6 62366 11027 1.166 !DANGEROUS LOAD-DO NOT USE!
ADI AP 2214 106.0 80.7 5.23 3151 97.8 57798 11712 1.171 ! Near Maximum !
IMR 4831 101.5 71.3 4.62 3150 100.0 62366 10464 1.168 !DANGEROUS LOAD-DO NOT USE!
IMR 7828 106.0 75.6 4.90 3149 97.3 56048 11894 1.189 ! Near Maximum !
Ramshot BigGame 90.3 68.4 4.43 3148 100.0 62366 10322 1.157 !DANGEROUS LOAD-DO NOT USE!
SNPE Vectan SP 11 90.5 68.5 4.44 3146 100.0 62366 10307 1.157 !DANGEROUS LOAD-DO NOT USE!
Winchester Supreme 780 100.2 77.5 5.02 3145 99.0 62366 10948 1.152 !DANGEROUS LOAD-DO NOT USE!
Rottweil R904 100.4 72.6 4.71 3140 98.2 62366 10968 1.149 !DANGEROUS LOAD-DO NOT USE!
Hodgdon H4831 106.0 75.6 4.90 3138 97.3 60380 11273 1.160 ! Near Maximum !