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Post by drinkwaj280 on Aug 30, 2020 9:54:12 GMT -5
I was looking for load data with these powders if anybody had any. I'm interested in min and max charges, velocities and best bullet weights. I currently have 250gr, 275gr BE's, 275gr Pittman Accumax bullets and 270 gr Parker E-Max bullets on hand. I plan to eventually swith completely to the Pittman after I shoot up my old stock Parkers. I have a SML with a modified sendero contour with a 26 inch barrel, HIS ignition, shank is 1.25 inch diameter and 5 inches long with a 1-20 twist. Any info would be greatly appreciated. Thanks.
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Post by Richard on Aug 30, 2020 10:37:58 GMT -5
Forget H-4350 altogether! Way, way too slow for those light bullets. It might work with the very heavy 350 gr. bullets but with large doses used with a much heavier barrels than you mention.
H-4895 is also too slow for those bullets on your list. Better than 4350 but no where near ideal. 4895 is more suited to bullets starting at 300 gr. and then, with weights of over 100 gr. You should be thinking more along the lines of 4198 (either H or I), N-120, IMR 8208 etc. Over the years, if you just scroll backwards thru the posts, you will find a ton of data on those loads under my name. The past year or so I have mainly been shooting 325 and 350 gr. Pittmans but prior to that, you will find data on 275 and 300 gr. bullets. Good luck and welcome to the forum.
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Post by hillbill on Aug 30, 2020 11:02:26 GMT -5
Richard is telling you straight
the 4198s will work well with those weight bullets
as low as the mid 60s- mid to upper 70s
will 4895 work with 275s? yes but it's not optimal.
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Post by sew on Sept 2, 2020 8:46:02 GMT -5
You’ve gotten great advice already. Shooting Richard’s former 45/HIS, similiar specs as yours, his initial advice or 70g 4198/300g and 72g/275 has worked very well.
I am not after serious long range nor target work; rather, just 300-350 yards max, primarily <200 yards. Those loads work great!
Picking the right speed of powder is very important in order to not have temperature sensitivity and to have clean burns. Pressure is not your enemy. 30K is generally much worse than 40K. For most loads (I almost exclusively shoot 40 cal, mid wt bullets at 2900 or less) loads, I try to keep , in the 40 cal, 40-45K psi and end up shooting powders more comonly used for heavier loads in the 45s. Concerning pressures for H4350 such as the 140g Bad Bull load/275 BE is absolutely mystifying. While accurate, it has to have extreme temp sensitivity and dirty burns.
Powder/Bullet wt//ignition/desired speed or recoil selection becomes an art to some degree, CF loading manuals can be of some help . The Quick load/Quick Tgt program can be very helpful.
Spending hours/days going back over previous loads can be very helpful. Richard has an unbelievable # of loads listed on Doug’s board under 45 cal load data. Always bear in mind, that HIS produces more pressure with the same load than 209 ignitions. I’d reduce 209 ignition loads at least 15% to use or start testing in HIS. Even more in DI.
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Post by huntandfarm on Oct 27, 2020 17:17:41 GMT -5
I am getting ready to sight in my first SML. What I have is a Remington 700 sporting a Brux Rem Varmint barrel. 1 in 20 twist at 26” long. The setup is using the Arrowhead breech plug designed for smokeless and a high quality muzzle brake.
My plan is to shoot H4895 powder with 300gn Parker Black Max..mostly because it’s what I have on hand. Where should I start with powder weight? Obviously I will be sizing the bullets to eliminate sabots.
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Post by hillbill on Oct 27, 2020 19:59:55 GMT -5
I have shot 300s with charges starting at 100 grains BUT I have big, heavy, long shanked barrels, speed is up there, in a 26" tube likely 3100+, not a load for the faint of heart for sure.
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