Heavy 454 velocity data

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WV460hunter

Single-Sixer
Joined
Aug 28, 2022
Messages
272
Location
West Virginia
Modern 45 colt and 454 are pretty close to each other these days. Garrett is making a monster 45 colt loading that's something like 400 grains at about 1300 fps if im remembering correctly. I wouldn't feel under gunned with that at all.
Well, in order to accurately assess and compare data from a manufacturer 3 things stand out to me .
1.The length of the barrel they tested in for each load.
2.The type of barrel test barrel vs regular actual revolver.
3.The temperature at time of testing.
All 3 of these can have significant impact on the fps.
Longer barrels will run faster, test barrels will run faster ,higher Temps at time of test will make it run faster.
I have a 300 gr. Load for my .460 that uses 40 grains of powder. It is of course a smack em' down hunting load.
This load is hot enough that in warmer temps during the summer while practicing it runs faster recoils sharper etc..
I think all the data shown tells me these 3 factors have to be looked at concerning the factory advertised data.
My load runs 1850 originally out of a 7.5" but I shoot it from a 10" I know I am gaining fps.

Other things to consider.
Cylinder gap also.
 

contender

Ruger Guru
Joined
Sep 18, 2002
Messages
24,812
Location
Lake Lure NC USA
While this is an old post,, the OP did an extensive testing. And one of his goals was to test how good or bad the ammo did concerning "crimp jump."

As for velocities,, it's common knowledge that "published" information is more than just velocity. As noted above,, the type of gun/barrel used in the testing, temperature, length etc. Factories are going to optimize their results for sales purposes. And if the "advertise" a higher velocity, and it fails to achieve that in "other guns,) then their liability is reduced if someone does something stupid.

I just loaded a different bullet in my 9mm match ammo. I then chronoed the exact same ammo in (2) different guns. I got a 30 fps average difference in the two GUNS! No surprise about velocity differences.
 
Joined
Nov 30, 2022
Messages
4,271
Location
Maryland
One of the best most thorough "posts" I have seen. Better than most magazines that I read. Any really heavy loads need a solid crimp to prevent jump. I run 330's in my Dan Wesson and the slightest jump will lock up the gun!
 

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mgobel

Bearcat
Joined
Jun 14, 2023
Messages
1
Location
Minnesota
I will add to the data. Ruger Alaskan 454/45 Colt

CaliberBrandWeight (gr)AMV (fps)ME (ft lbs)FirearmDate
45 ColtHSM
325​
885565Ruger Alaskan 454 /45LC
1/6/2022​
874​
888​
913​
872​
878​
22 degrees
45 ColtBuffalo Bore
325​
1086851Ruger Alaskan 454 /45LC
1/6/2022​
1091​
1087​
1079​
1095​
1078​
22 degrees
45 ColtGrizzly
335​
1082871Ruger Alaskan 454 /45LC
1/6/2022​
1097​
1004​
1119​
1087​
1104​
22 degrees
45 ColtUnderwood
325​
1054802Ruger Alaskan 454 /45LC
1/6/2022​
1039​
1052​
1072​
1047​
1061​
22 degrees
45 ColtGarrett
365​
957742Ruger Alaskan 454 /45LC
1/6/2022​
966​
965​
948​
949​
957​
22 degrees
45 ColtGarrett
365​
987789Ruger Alaskan 454 /45LC
6/8/2023​
988​
989​
977​
993​
986​
85 degrees
45 ColtGrizzly
335​
1132954Ruger Alaskan 454 /45LC
6/8/2023​
1129​
1138​
1122​
1126​
1147​
85 degrees
454 CasullHornady
300​
12901109Ruger Alaskan 454 /45LC
1/6/2022​
1304​
1287​
1262​
1296​
1303​
22 degrees
454 CasullGrizzly
335​
11851045Ruger Alaskan 454 /45LC
1/6/2022​
1192​
1179​
1182​
1196​
1176​
22 degrees
454 CasullHornady
300​
13381193Ruger Alaskan 454 /45LC
6/8/2023​
1357​
1303​
1345​
1323​
1362​
85 degrees
454 CasullGrizzly
335​
11931059Ruger Alaskan 454 /45LC
6/8/2023​
1206​
1195​
1167​
1206​
1190​
85 degrees
454 CasullFreedom
300​
12391024Ruger Alaskan 454 /45LC
6/8/2023​
1190​
1285​
1225​
1253​
1244​
85 degrees
 
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