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> point of impact
point of impact
@ 09:04 am (GMT) |
Brendon GreigI Took a trip to the range today to double check the two loads i am using in my 243 mostly shooting goats i made some loads up a few months ago using ADI 2209 powder and hornady 87 grain V max these were very effective but being very frangible I decided to load some 85 grain BTHP sierras for winter hunting when they are in heavy winter coats and possibly wet as wellanyway expecting a change in point of impact i recited my rifle at 100 yards to suit the sierras 1.7 inch's high and then checked the hornady Vmax there point of impact was exactly the same as the sierras vertically but were 1 inch to the left so i thought I would see how much difference there was at 200 yards the sierras are bang on and the Vmax's are still 1 inch to the left so proving to me my rifle shoots straight with both, if I change between bullets I will either just allow for it or if I am going to take a long shot adjust my scope 4 clicks to the right for the Vmax's I checked my scope to make sure it adjusted correctly and 4 clicks puts it bang on for the Vmax and vice verser |
Replies
@ 01:50 pm (GMT) |
Bryan WebsterRe: point of impactI used to shoot the .243 Win years ago and found the Sierra HPBT you are using to be very effective. Shot several mule deer out around 400 to 450 with it but many more deer were under 300 yards. I also found the 85 grain Nosler partitions to do very well on large mule deer, and with the 95 gr partitions took a few bull elk with it as well but kept the range to 300 or close as I could get. I was pleased with the results but when I moved from Southern BC to moose and elk country in the north, I went to a 30/06 almost right away.The .243 rifle I had struggled to group with the heavier bullets due to its 1:10 twist rate, so I basically kept most shots in a reasonable distance while hunting. Coyotes and several wolves however were fair game with the Sierras if the winds were calm out to farther distances with no issues. |
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@ 08:41 pm (GMT) |
Brendon GreigRe: point of impactHi guys just adding to my post one of the reasons I wanted to check my zero's at 100 & 200 yards with both bullets was in my mind was if it shoots straight with one bullet and an inch to the left with the other at 100 yards at 200 yards I thought it would be 2 inch's to the left my reasoning for this was i presumed that there was a degree or two difference in horizontal trajectory meaning the bullets would leave the barrel in a "V" compared to one another making the point of impact wider the further the distance you shoot over this obviously isn't so but leave the barrel different and travel parallel to one another and yet there vertical trajectory must be the same can anyone shed some light on this so I understand whythanks in advance for any reply's Brendon |
@ 11:42 pm (GMT) |
Nathan FosterRe: point of impactYes, it should just keep moving out. Factors such as slight changes in wind, rifle hold, changes in shooting position or terrain all have an effect. From what you have described, I would still be aiming for 4 clicks right. |
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