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Post by cuda on Aug 4, 2011 11:24:09 GMT -5
Could we load up to a 458 Winchester Magnum Load Data ? With a Barnes 300gr and 73gr of IMR4198 at 2675fps in our 50s? I have no idea of what pressure it would have that is why I ask first. I know that I am now using a 300gr Remington with 69gr of IMR4198 in my gun now. But do not want to over do it. So would it be safe or not to try? My son asked me and I do not know so I will ask here first. Thanks!
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Post by Chris Champion on Aug 4, 2011 12:54:15 GMT -5
I never shot IMR4198 in the 50 cal but shot a lot of H4198 with 300g bullets and hit the sweet spot for accuracy at 67g. Wilms has shot some heavy loads with H4198 and is currently shooting a .458 325g bullet with 70g. RB used to say that with H4198 and 300g bullets your shoulder will tell you when its time to stop before you get to an unsafe load level. A 300g bullet at 2675 fps will rock your world. Have fun!
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Post by GMB54-120 on Aug 4, 2011 13:20:46 GMT -5
What he said.
I would bet you stop before reaching a dangerous level.
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Post by zakjak221 on Aug 4, 2011 13:49:50 GMT -5
I read that Imr 4198 is hotter than H4198.
Many guys shoot 70 gr's of H4198.
Jeff in Iowa shoots a lot of H4198 as well with .458 bullets.
Mark
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Post by moto357 on Aug 4, 2011 14:24:00 GMT -5
you aren't shooting a 458, you're shooting a 50. pressures are different and in no way can one be compared to the other
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Post by rangeball on Aug 4, 2011 14:28:39 GMT -5
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Post by cuda on Aug 4, 2011 15:32:00 GMT -5
Well now I have to let him read this so he knows too. As he uses the gun too. And I did not want him to do something stupid when I was not there. He is 27 and should know better but. Thanks for the imput!
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Post by zakjak221 on Aug 4, 2011 15:32:48 GMT -5
Range--nice,condensed chart there!!
Keeps it simple.
Mark
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Post by rangeball on Aug 4, 2011 15:43:57 GMT -5
RB will always be the man  |
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nic58
8 Pointer
Posts: 237
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Post by nic58 on Aug 4, 2011 18:02:39 GMT -5
RB will always be the man No doubt about that! RB also used to say that with H4198 and a 300 gr. bullet, that means about 2600fps as a maximum load that won’t blow bare sabots. I do miss RB's posts on here.  |
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Post by GMB54-120 on Aug 4, 2011 20:58:29 GMT -5
I cant imagine going over 2400fps with a 300gr or 325gr FTX. Maybe with another 5lbs added on a sled.  IIRC the 450Marlin and the FTX is around 2350fps in the LeverGun ammo and Ruger #1 45/70 loads should be able to beat that. I know over 60gr of N120 and a 325gr, it starts to get noticeable but not terrible.  The 385gr i shoot in my little brush gun is worse though. |
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Post by TGinPA on Aug 5, 2011 9:34:15 GMT -5
In March, I traced some fairly stiff loads for Deadeye using resized 325gr bullets and H4198 in a 45 cal. barrel. Though these loads are not in 50cal, the pressures generated would surely exceed that which would be seen with comparable loads in a 50 cal barrel and for that reason may be of value to this thread. Gage and Module Manufacturer = RSI USB model Trigger Sensitivity = 2, Strain Gage Voltage =4.9 Gage Factor =2.1 PSI Correction Factor: 0 Barrel Temp = 64-65 degrees F. measured at the sensor (IR). Rifle Stand: Caldwell Lead Sled Altitude: 450 ft Chronograph: Chrony Alpha Model 8 ft from muzzle. (8 fps added to all recorded velocities to correct for distance of chrony from muzzle.) Barrel Type: PacNor .45 Cal Muzzleloader Barrel OD = 1.06 in Barrel ID = .452 Breech Plug:Savage Std. (screw-in ventliner) ventliner orifice .033 in. Sensor dist fm BP= 1.1in. Bullet Diam.= .452 in. Resized to .448 Bullet Type = Parker 325be Bullet weight = 325gr. ,unknurled. Sabot: None Wads: .06x.462 lubed fiber under lubed wool. Powder: T1= H4198 60 gr. T2= H4198 65gr. T3= h4198 70 gr. Primer: Fed209A Shot fm dirty barrel. These loads seemed safe in my barrel but may not be under different conditions.  |
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Post by shoot2reload on Aug 5, 2011 11:35:17 GMT -5
I think the original question is well covered above, but just to reiterate, .458 Win Mag load data isn't necessarily a good ballistic equivalent for our rifles.
If you're perusing reloading data, .450 Marlin is a lot closer. But I'd feel a lot more comfortable simply sticking with RB's suggestions.
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Post by Chris Champion on Aug 5, 2011 21:51:03 GMT -5
RB used to use the .450 Marlin as a baseline for 45 cal barrel load and IIRC the .50 Alaskan was one of the calibers he used for the 50 cal.
What RB put together in the chart that Range posted is one of the most useful bits of info that was ever put on this site.
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Post by cuda on Aug 7, 2011 9:02:18 GMT -5
This was for 50cal only. Thanks for the replys.
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Post by Richard on Aug 7, 2011 19:37:51 GMT -5
Funny, I all my experience, IMR 4198 has always been slower than H-4198 by about two grains?
Richard
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IIRC the 450Marlin and the FTX is around 2350fps in the LeverGun ammo and Ruger #1 45/70 loads should be able to beat that.
The 385gr i shoot in my little brush gun is worse though.