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Hello, this is not at all Long Range Shooting related but: I have a CZ-550 in .375H&H. I would like to shoot mostly Norma ammunition with 300gr Oryx bullet. But, for longer ranges or on smaller game, I would like to shoot also light and fast loads. So my qustion is. Is there any "prediction" ballistic software, which will tell me this: If you will zero your rifle with this bullet, that fast with this BC at this range, different bullet with different speed and BC will be over or under x inches than your primary load at this range. Is there anything like this? Jiri | ||
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My best advice to you is to just shoot the loads you are interested in. Typically it goes "lighter-lower" "heavier-higher". Otherwise, just settle on one load and shoot it at the different ranges you are going to hunt. If ignorance is bliss; there are some blissful sonofaguns around here. We know who you are, so no reason to point yourselves out. | |||
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THIS ONE is a lot easier to use but it doesn't have all the preprogrammed bullet data. /////////////////////////////////////////////////////////////////////////// "Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy, its inherent virtue is the equal sharing of misery." Winston Churchill | |||
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Personally I like to shoot them because there is often times a horizontal change also. Molon Labe New account for Jacobite | |||
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Sometimes the best response is to point in another, more practical direction. If he does not know what the loads actually do, output from a computer may very well be meaningless. If ignorance is bliss; there are some blissful sonofaguns around here. We know who you are, so no reason to point yourselves out. | |||
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. Hey hitman, Can you fill me in on your long range experience? Post some pics of your long range rifle set ups and maybe tell us where you practice and how often you shoot? Thanks. | |||
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Thank you guys for answer. I use many of ballistic softwares, mostly PointBlank or old PCB. But none of these is capable to calculate what I asked for. I know that the best way is to shoot it and measure, but I was interested in some kind of estimation. Jiri | |||
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His advice is spot on, so what is your problem? _____________________________________________________ A 9mm may expand to a larger diameter, but a 45 ain't going to shrink Men occasionally stumble over the truth, but most of them pick themselves up and hurry off as if nothing had happened. - Winston Churchill | |||
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Why do you assume there's a problem? I'd like to know his background especially since he's giving advice. He didn't give "spot on advice" as the question was this:
And my question was to him, not you. What's your problem? | |||
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Actually, without knowing the particulars such as exact velocity of his load out of his rifle, a prediction of his trajectory will be flawed. So, MSHitman's advice to actually go out and shoot them is "spot on" advice. Case in point: The first time I chrono'd my .338 Lapua, on a bright, sunny day, I got a reading on my Oeler 35 -- an average velocity of 2,820 fps with 300 SMKs. My trajectory at 500 yards and my predicted trajectory were pretty close, but at 972 yards, I was consistently low despite the predicted trajectory. I went back to my 100 yard zero to confirm it was on, I chronographed the load again but this time on an overcast day, and this time my average velocity was 2,791 fps. Voila, now my predicted trajectory matched my actual trajectory. 29 fps was enough to negate my predicted trajectory compared to my actual trajectory. One can actually shoot and record their results without actually knowing the exact velocity, and they will be accurate. _____________________________________________________ A 9mm may expand to a larger diameter, but a 45 ain't going to shrink Men occasionally stumble over the truth, but most of them pick themselves up and hurry off as if nothing had happened. - Winston Churchill | |||
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This was the man's question and a couple of us actually answered it. He wants to know about ballistic programs that can help him estimate POI at different ranges. This by the hitman I don't understand:
As for your "case in point", of course you have to shoot the loads at different ranges to confirm what the ballistic program spits out after you have put in the best parameters you have at the time. This is step 2. You most always have to tweak those inputs to make the program match exactly to what your actual observations are. The point is that you had some estimated data put out by the program to start shooting that was very close. That is what he wants. Step 1 The advice by hitman to just go out and shoot them without any idea of POI, hold over and guess, is Lame. | |||
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I think we all need a little breather. Consider this for a moment or two: Everybody calmed down? As I understood the question the OP asked if there was a program to predict where the POI of different loads he was planning on using through his rifle would be. His question was rather open-ended and so two strands of answer have been presented. The first, believing the matter to be a question of trajectory, have reccomended good ballistics programs and the OP will certainly get very usable long range data with that. He will of course end up confirming his theoretical data anyway as he will no doubt practice up to and including his pre-supposed maximum range. The second camp consider the matter to be a question of barrel harmonics involving the variables of different powders and bullets liable to result in wildly differing POI, in both the horizontal and vertical planes, and so to shoot the planned loads at various distances and settle on the loads showing only a small amount of, ideally vertical, dispersion. They maintain that you will not know which way the POI will be until you shoot the other load. In my experience it's a matter of luck, some bullets shoot to the same vertical line of dispersion ( In my 30.06I have found that 150gr Speer BTSP over H4895, 168 gr TSX over H4350 and 180 gr Hornady BTSP over H4831 group within three inches of each other on the vertical, the heaviest and lowest velocity striking lower in that rifle) and sometimes you don't (165gr Partitions shoot three inches high and six to the left in the 30.06 and 165gr Federal bluebox and premiums differ by two inches left to right in the 308). If I have understood your question correctly, you need to shoot find two (or however many loads you need) that differ very little on the vertical axis, put the zero's at x yards into the ballistics program, get your drop tables and go shooting. See, everyone one was right!  | |||
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Ghubert, "blessed be the peacemaker..." and those with a keen sense of humor as well. Back to the orginial question, the web site ammoguide.com may well hold some of the answers for the question. That site only recently upgraded some of it's programs and worth checking out would think. | |||
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Koom-buy-ya!  Still wondering where you found the biographical video of a few of the members!   | |||
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