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Post by catfan on Dec 13, 2023 20:44:00 GMT -5
I have a CVA Scout 45/70 Hankins conversion with the HIS that I have had for several years. Always has served me well with 65 grains of IMR4198 with 275 grain Pittman AM. I cant find any IMR4198 but do have 2 lbs of IMR4227. Reading the forum I see most are using between 50 and 54 grains with same 275 grain AM. My question, is there a big difference in powder column between the HIS and the DIIsystems that would be of concern using 4227 between this 50 grain and 54 grain weight?
In other words is 50 grains a safe starting load for both HIS and DI Scout conversions?
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Post by buckeye68 on Dec 13, 2023 21:17:39 GMT -5
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Post by yoderjac on Dec 13, 2023 23:19:44 GMT -5
4198 was hard to find for a while, but you can buy it directly from Hodgdon on their web site in 1lb bottles or 8 lb jugs. It shows unavailable most of the time but if you just keep checking, from time to time it shows available. I ended up buying an 8lb jug from them a while back by watching the site daily.
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Post by catfan on Dec 14, 2023 12:48:16 GMT -5
Cant find it local and the places I buy powder on line from are out too. Either way, I will find some but need to use what I have on hand for now, which is 4227. Thanks for the input. Cant be too safe smokeless powder.
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Post by lbahunter on Dec 14, 2023 23:11:26 GMT -5
I have a CVA Scout 45/70 Hankins conversion with the HIS that I have had for several years. Always has served me well with 65 grains of IMR4198 with 275 grain Pittman AM. I cant find any IMR4198 but do have 2 lbs of IMR4227. Reading the forum I see most are using between 50 and 54 grains with same 275 grain AM. My question, is there a big difference in powder column between the HIS and the DIIsystems that would be of concern using 4227 between this 50 grain and 54 grain weight? In other words is 50 grains a safe starting load for both HIS and DI Scout conversions? I have the Hankins ASG DI replacement plug. My DI plug takes up most of the 45-70 chamber. I have a small powder chamber. So hypothetical, if I wanted to shoot a 300gr bullet with 4227, how many grains of 4227 would I start at? Would I just put enough powder in to keep the bullet out of powder chamber and go up from there? |
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Post by Richard on Dec 15, 2023 8:17:42 GMT -5
Use 2 gr. Less of 4227 than 4198 to achieve similar velocity and accuracy. Worked very well for me over the years!
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Post by buckstuds on Dec 15, 2023 12:29:38 GMT -5
I think that would be too much pressure for a scout.
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Post by buckeye68 on Dec 15, 2023 16:44:16 GMT -5
I personally 53.5 grains of 4227 with a 275 bullet. No issues with over 200 shots on a CVA blue and black Scout.
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Post by Richard on Dec 15, 2023 18:59:03 GMT -5
Seems he was looking for a powder to replace 4198? I just gave him a powder and amount that was equivalent to his 65 grain load. Which he was happy with.
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Post by buckeye68 on Dec 15, 2023 23:51:54 GMT -5
Yes, you’re correct, but 4198 vs 4227 is not a grain for grain change out. 4227 builds pressure faster than 4198. In a break action it’s all about safety because of the smaller barrel diameter than a bolt gun.
I did some testing with my CVA black and blue Scout using 4227 and 4198 with 265 Fury grain green tipped bullets with large rifle primers using the DI system.
A cut down factory barrel at 17” using 55 grains of 4198 produced 2305 FPS.
A cut down factory barrel at 17” using 53 grains of 4227 produced 2450 FPS.
As you can see with using 2 grains less of 4227 and producing 145 FPS faster than 4198. The only way this can happen is 4227 is building pressure faster than 4198.
I personally would not go over 55 grains of 4227.
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Post by nolan2506 on Jan 14, 2024 9:22:53 GMT -5
I just got mine cva scout blued barrel together and shot 65 gr 4198 with 275 Pittman 2500 fps 5/8 group at 100 and then try some hornady 250 gr ftx and 300 gr sst niether shot well with 4198 so used 60 grain of 4227 with wool wad and cutting holes at 100 the 250 ftx 2660 fps and 300 2520 fps and I use hanks HIS with magnum primer primer and module look perfect after 20 rounds so I say stay 5 gr below your 4198 loads and pressure should be close. But be safe it ok build up one grain at a time as to every gun is different as to one may shot 60000 all day and next same make and model split camber (just example) watch module and primer close good luck and be safe!
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Post by dennis on Jan 14, 2024 18:29:35 GMT -5
In review of data I received a couple years ago  [/url] |
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