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Post by Alabama on Aug 27, 2014 16:41:04 GMT -5
As we edge closer and closer to deer season and cooler temps. loss in velocity concerns me. I am currently shooting 70 gr I-4198 SF 275 mh. Since I reside and hunt in Alabama our temps can be as low as 20-25 to as high as 70-75 during deer season. I have not had my rifle through a season yet and have no idea how its going to preform in cooler weather. I see post here saying 2-300FPS drop in cold weather. Should I expect that type of drop?
I now have the ability to duplex with 4759, thanks to Jeff H. but I really don't want to. I like things simple. But I will if my velocities are going to fluctuate I will make a change. Our mornings may be 30 and afternoons may be 55-60 degrees. I may be reading to much into other posts but some feedback would be greatly appreciated!
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Post by ratsnakeboogy on Aug 27, 2014 16:59:00 GMT -5
I shot over a chrono last year with 60gr. H4198 at 68 degrees, then again at 23 degrees. Velocity drop was 218fps. Continued shooting and velocity increased as barrel warmed up.
Shooting 10/50 SR4759/H4198 this year. I have not run it over a chrono yet, but several on here say it will solve the cold barrel fps drop problem. I will know after this year.
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Post by Deleted on Aug 27, 2014 17:05:34 GMT -5
Savage Shooter developed the 10/50 4759/h4198 saboted load .45 to be a temp insensitive load and has proven it to be so....I'm taking that the 10/60 sabotless load is the sabotless version of the 10/50 and should also be temp insensitive....If you bought the .035 or.040 bushing ,then would that help you be less temp. sensitive burning a single powder....? I believe you are shooting the .030 bushing now IIRC....
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Post by Alabama on Aug 27, 2014 17:18:46 GMT -5
Yea, I am shooting the .030 bushing
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Post by Dave W on Aug 27, 2014 17:38:37 GMT -5
Never tried the I version, always used the H version since Hodgdon deems it as one of their Extreme Powders. H4198 roughly loses a fps per degree in my testing.
Example: 275 BE, .060 veggie, Fed 209A 2733fps @ 13* 2796fps @ 74*
Tested loads from the mid 50gr range up to 70gr, maybe a little higher, with bullets ranging from 200-300gr. The pattern holds pretty consistent, but the 200gr bullets are worse, saboted or sabotless.
Where I have seen loads take more drastic hits in velocity and accuracy is when temps drop into the teens or colder.
My gut says you will be OK given the temp range you mentioned but bottom line, you are going to have to get out and test. Make sure you test cold fouled bore shots also, those don't always react the same as shots that have a little heat in the barrel.
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Post by Alabama on Aug 27, 2014 17:43:27 GMT -5
Dave, what effect will 60fps +/- have on a 200 yd shot? 1/2"? I sure plan on testing. Just hope its not warm all the way up till first day of season
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Post by Dave W on Aug 27, 2014 18:02:38 GMT -5
Dave, what effect will 60fps +/- have on a 200 yd shot? 1/2"? I sure plan on testing. Just hope its not warm all the way up till first day of season You will have to plug your numbers into JBM or one of the other ballistic calculators and then verify but should not be very drastic. Been a few years since I shot straight powder loads with any regularity. Savageshooter is from Arkansas and has the same type of weather as you I believe. He tried sabotless with straight 4198 for a brief period a few years ago, think he had issues with cold bore shots POI between morning and afternoon. If you can get in touch with him he can tell you what to expect. The guy really knows his stuff when it comes to these guns and loads. |
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Post by jhm on Aug 27, 2014 18:23:04 GMT -5
I'm interested in this discussion, and was going to post a similar question. I shoot the 275 grain MH as well. I have plenty of H4198 and VVN120. Where I hunt it can get down to 10 degrees. I was using N110 as a booster, but have experienced a noticeable velocity drop in cold temperatures. I can't seem to find Clays around here, or I would try Richards proven load. I do have Bluedot and 4759. Are there any recommendations with these powders? My problem is finding the time to experiment. Which is why I really appreciate the information that many seasoned shooters share here.
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Post by Dave W on Aug 27, 2014 18:41:04 GMT -5
N110 & N120 are notorious for not playing well together. That Panhandle guy can hook you up with some 4198 duplexes!  |
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Post by jims on Aug 27, 2014 18:52:06 GMT -5
Dave W is correct on the VN powders. SW as I recall noticed a significant drop off in speed in cold temps with those powders.
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Post by Deleted on Aug 27, 2014 21:55:00 GMT -5
N110 & N120 are notorious for not playing well together. That Panhandle guy can hook you up with some 4198 duplexes! Like Dave said, like many here I've tried pretty much every combo with H4198... Red Dot,Blue Dot, Unique, Clays, 4759, N110... Had some good results with a few... After all that I'm going back to a load that Dave came up with ...11/59 N110/H322... There is none more accurate or consistent for me.. Another plus is that it works just as well with 250 or 275 gn bullets... Thanks Dave W Zen |
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Post by Dave W on Aug 28, 2014 6:55:05 GMT -5
N110 & N120 are notorious for not playing well together. That Panhandle guy can hook you up with some 4198 duplexes! Like Dave said, like many here I've tried pretty much every combo with H4198... Red Dot,Blue Dot, Unique, Clays, 4759, N110... Had some good results with a few... After all that I'm going back to a load that Dave came up with ...11/59 N110/H322... There is none more accurate or consistent for me.. Another plus is that it works just as well with 250 or 275 gn bullets... Thanks Dave W Zen You seem to be doing really well with 4198 that last range report I saw. Thought maybe you had decided to go in that direction. |
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Post by Deleted on Aug 28, 2014 7:02:49 GMT -5
Like Dave said, like many here I've tried pretty much every combo with H4198... Red Dot,Blue Dot, Unique, Clays, 4759, N110... Had some good results with a few... After all that I'm going back to a load that Dave came up with ...11/59 N110/H322... There is none more accurate or consistent for me.. Another plus is that it works just as well with 250 or 275 gn bullets... Thanks Dave W Zen You seem to be doing really well with 4198 that last range report I saw. Thought maybe you had decided to go in that direction. He can never make up his mind. It's like hunting with your wife. Lol! |
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Post by Dave W on Aug 28, 2014 7:20:30 GMT -5
You seem to be doing really well with 4198 that last range report I saw. Thought maybe you had decided to go in that direction. He can never make up his mind. It's like hunting with your wife. Lol!  You got a good partner there for sure! |
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Post by Deleted on Aug 28, 2014 7:44:44 GMT -5
 You're both right... I was headed in the H4198 direction.. Running out of N110 and couldn't find any... There are plenty of good combos using H4198 that will more than get the job done.. Anyhow... I found some N110 and had 5# of H322 so I switched back... I've still got several pounds of H4198 and plenty of the other starters so you never know... ... Can't go wrong with eitber.... I'll be taking RR to school in a few weeks... Hope he gets it right this time around Zen
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Post by hankinsrfls on Aug 28, 2014 7:48:50 GMT -5
Alabama...
I tested my load in -4 and in 90 degree heat, my velocity loss was 46 fps. Noting for me to be concerned about...
You will need to test your velocity on a hot day, then check it on the coldest day you can, load your gun the night before and leave it out side till you shoot it in the morning.. Jeff
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You're both right... I was headed in the H4198 direction.. Running out of N110 and couldn't find any... There are plenty of good combos using H4198 that will more than get the job done.. Anyhow... I found some N110 and had 5# of H322 so I switched back... I've still got several pounds of H4198 and plenty of the other starters so you never know...