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Post by afisher on Sept 2, 2021 16:42:23 GMT -5
I know you guys consider 78gr the top end for 275gr bullets and heavy shank barrel for H or I 4198 in a 45cal. What say you on N120 with a 275, HIS ignition and 1.250” shank barrel in a 45cal? Seems ive seen it stated that it’s a touch “hotter” so max is a little less.
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Post by Richard on Sept 2, 2021 17:42:03 GMT -5
I would drop it to 75 grains of N-120. With 300 grain bullets I shoot 73 gr. of N-120 and 75 to 76 gr. of H-4198 to get similar velocity.
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Post by afisher on Sept 2, 2021 19:16:08 GMT -5
Thanks that’s around what I had in mind but wanted to double check on that. I came over some of this today and picked up a pound of it for I’ve been wanting to give it a try but hadn’t came across any. It was one that the local guy didn’t carry typically, but had some today.
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Post by tbye3300 on Sept 4, 2021 16:32:52 GMT -5
I know you guys consider 78gr the top end for 275gr bullets and heavy shank barrel for H or I 4198 in a 45cal. What say you on N120 with a 275, HIS ignition and 1.250” shank barrel in a 45cal? Seems ive seen it stated that it’s a touch “hotter” so max is a little less. I Chronographed some loads yesterday. I shot 58.2 grains of N120 with 275 Parker BE bullets. I got 2650 fps. I am shooting a 45 cal Rem/Kreg light Varmit contour barrel at 29.5 inches. I really like N120 speed with less powder. Obviously my setup is probably different as I am shooting Direct Ignition but I was happy with that speed for my Antelope hunt. |
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Post by afisher on Sept 6, 2021 17:46:42 GMT -5
I shot 75gr today and it seemed a touch hot in mine. It was not chronographed but bolt lift was a bit sticky and primers were pushed back a touch with standard brass modules.
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Post by jfg4570 on Jun 28, 2024 11:30:52 GMT -5
I know you guys consider 78gr the top end for 275gr bullets and heavy shank barrel for H or I 4198 in a 45cal. What say you on N120 with a 275, HIS ignition and 1.250” shank barrel in a 45cal? Seems ive seen it stated that it’s a touch “hotter” so max is a little less. I Chronographed some loads yesterday. I shot 58.2 grains of N120 with 275 Parker BE bullets. I got 2650 fps. I am shooting a 45 cal Rem/Kreg light Varmit contour barrel at 29.5 inches. I really like N120 speed with less powder. Obviously my setup is probably different as I am shooting Direct Ignition but I was happy with that speed for my Antelope hunt. Did some speed testing with N-120 and had 2605 fps with 58 Gn charge, shooting 275 fury, so that will be the max i will go in .45 CVA converted with HIS |
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jarhead TX
Full Member
Getting ready for another season
Posts: 108
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Post by jarhead TX on Jun 28, 2024 20:27:23 GMT -5
Speed is great but accuracy is better!
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Post by jfg4570 on Jul 3, 2024 19:41:02 GMT -5
Accuracy was good too, 1 inch group at 100, will try 200 yard next time.
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