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Post by huntrrr on Jul 17, 2011 16:37:06 GMT -5
I have been looking at ordering a drop compensation turret from Kenton industries. I was wondering if anyone here has ordered one for their smokeless ml. Also if someone might know the bc for the Remington 300 gr .458 bullet. I need to include the bc along with the other specs when ordering this turret. Thanks for any input Huntrrr..............
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Post by mike3132 on Jul 17, 2011 17:05:28 GMT -5
0.197 is the B.C. for the Hornady 300 HP .458 and the Remington is almost identical. I think you could use it. Mike
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Deleted
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Post by Deleted on Jul 17, 2011 17:27:03 GMT -5
Are you not kinda locked into one load using that type of knob?
A temp sensitive powder would not work too good either.
Imo if you could send them your reallife range data at different yardages they could make a more accurate knob for you.
Just a couple thoughts. On long range shots it should help out tremendously. Please let us know how it works for you.
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Post by huntrrr on Jul 17, 2011 18:07:19 GMT -5
Well you are correct that once a knob is set up its pretty mush a one load turret. I deer hunt primarily here in Va. And have settled on the 300 gr remingtons because off accuracy and field performance. My thoughts on the temp. sensitivety issue is to look at chrony data established on days when temps are closest to hunting conditions. They have worked really well on centerfire rifles from deer to varmints . I can take a 308 i have zero at 100 yds then dial up and its just about perfect to 500 yds. I dont have a range to test beyond that but im sure it would be dead on. Just thought to make adjustments in a second or two while hunting it could be a real asset.
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Post by Deleted on Jul 17, 2011 21:09:00 GMT -5
Sounds like a good plan and with your chrono reads should be tuned in to your load,nice.
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Post by huntrrr on Jul 17, 2011 22:11:09 GMT -5
Mike thanks for your input. It does seem to have a simialer profile so should be close enough.
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Post by cuda on Jul 18, 2011 12:58:42 GMT -5
I would like to know how well it work too.
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trb0
8 Pointer
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Post by trb0 on Jul 18, 2011 21:25:58 GMT -5
Ive used one for about 6 years on my .50 Savage and it works great. Longest kill was on a doe at 410 yards off of sandbags. Anything 300 yards and in it really ads to your confidence to hold where you want to hit and squeeze the trigger. I am building a .45 Pacnor that should be done in a few weeks and will have one on it also. Tim Baldwin
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Post by Deleted on Jul 18, 2011 22:31:18 GMT -5
Trbo,
Did you just fill out the data card or what?
Your experience can help out alot here, especially huntrrr and , me to, I am interested in what data you sent them to make your
turret knob. I have no problem with the concept its just matching the knob to what the real ballistics are. I'm glad someone here has some experience with the knobs, i've got a feeling the 200 yd shot is going to be the 100yd shot in the future. A "tuned in turret knob" should make it easier to make those longer shots possible and without a spotter.
Thank you Tim for sharing your experience.
Greenhorn
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trb0
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Post by trb0 on Jul 19, 2011 20:29:20 GMT -5
Greenhorn, once i got my load tuned and shooting well i chronographed it several times while shooting and figured the BC of the bullet just a little lower than advertised by the company. I then shot it at various ranges 100,200,300,400 yards and checked it on a ballistics calculator to see how close the actual BC numbers were. Out to 300 yards it isnt nearly as critical but after that the low BC really shows up fast. To answer your question i did a little of both(using ballistics/ actual shooting at different ranges) but inside of 300 yards the ballistics only will be sufficient. Remember this is on a 250 grain SST at 2475 fps. Im hoping the 195 Barnes at 2700 is much better. 1 270 847 2969 if you have questions. Tim Baldwin`
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Post by Deleted on Jul 19, 2011 21:04:35 GMT -5
I think you'll be hearing from Huntrr or at least you should.
Your technique in getting the RIGHT data to give to the manufacturer is a good one, not using the bullet's advertised BC was a wise move,plus shooting all the different ranges gave you
Real life ballistics ,which in turn gave you an accurate knob on top of your scope,nice. Thank you for sharing...!!!
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trb0
8 Pointer
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Post by trb0 on Jul 19, 2011 21:15:04 GMT -5
Glad i could help. I forgot to mention that you have to have a good quality scope that tracks well. I have the same setup on 2 centerfires. Tim Baldwin
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Post by huntrrr on Jul 21, 2011 20:20:46 GMT -5
Tim thanks for your help I figure with the right info ( need to check bc for rem 300 ) it should do as well as my centerfire . I just cant seem to find info for 300 gr remington .458. Tim 1321 was kind enough to point out the hornady 300 gr are very similar in profile. Might just go with that if I can't find additional data. Thanks again Huntrrr............
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Post by cuda on Jul 22, 2011 6:56:12 GMT -5
IIRC it is .197 for the 300 Rem .458 I found that some where when I desided to use them in my 50.
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Post by huntrrr on Jul 22, 2011 8:30:16 GMT -5
OK great thanks I'll let you all know how it works out . The last piece of the puzzle will be determining the sight height above bore. I am familiar with how to measure I am not sure how to do this with a Leupold vx-L. I have always taken half the diameter of the barrel half the diameter of the objective lens of the scope than the distance between the barrel and the scope to determine sight height above bore. In this instance the profile of the scope allows part of the scope to be lower than the top of the barrel. Any suggestion on how to measure?
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Post by Deleted on Jul 22, 2011 9:56:58 GMT -5
In the advertisement for the vxl the 50mm objective can be mounted as low as a 36mm objective and the 56mm can be as low as a 40mm objective, if that helps any???
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Post by esshup on Jul 22, 2011 10:29:58 GMT -5
Measure from top of scope tube to bottom of barrel. Subtract half the scope tube dia and half the barrel dia at that measurement point. That resulting number = centerline of scope tube to centerline of bore.
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Post by huntrrr on Jul 23, 2011 7:19:02 GMT -5
Thanks essup there I go overthinking again. That simplifies the whole process. Many Thanks Huntrrr...........
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