Castle Rock
WKR
- Joined
- Mar 28, 2020
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- 1,110
A tikka 8 twist 243 was a no brainer right from the start
Is there anything I would gain with the 8-twist versus a 10-twist other than the ability to stabilize bullets over 100 grains?A tikka 8 twist 243 was a no brainer right from the start
Is there anything I would gain with the 8-twist versus a 10-twist other than the ability to stabilize bullets over 100 grains?
What is the issue with the 95gr boat tails? I plan on shooting 90/95 gr ballistic tips (assuming they group well in whatever rifle I end up with). I was under the impression that the 10 twist was good to go for bullets up to 100 grains, but the 8 twist was better for anything over 100 grains.The various 95gr boat tails have been said to be an issue for some 1:10” twist 243 rifles. With a 1:9 or 1:8, those are a slam dunk. Nosler began doing their factory loaded 243 Win ballistic tips in 90gr and the 6mm Creedmoor in 95gr for this reason.
What is the issue with the 95gr boat tails? I plan on shooting 90/95 gr ballistic tips (assuming they group well in whatever rifle I end up with). I was under the impression that the 10 twist was good to go for bullets up to 100 grains, but the 8 twist was better for anything over 100 grains.
Good to know. Thank you. So...is there any downside to a faster than 10 twist? I know you gain the ability to better stabilize the longer, heavier bullets (and possibly the 95 gr NBTs) with the faster twists ...but is there anything you give up by going from a 10 twist to a faster twist? Does the 10 twist stabilize the lighter bullets better?The 10” twist is marginally adequate for 95gr boat tails. The 100gr bullets are normally fine as long as they are flat base. I called Nosler and asked them. They said that the 95gr ballistic tip had become very popular as a hunting bullet, but it wouldn’t stabilize in a fairly good number of 1:10 barreled 243’s, including people who worked at Nosler. So, they designed a 90gr to address the problem.
Interesting. The altitude where I hunt can range from around 850 - 2800 feet. I had no idea that altitude effects bullet stabilization.They work well in my 243 the 95 gr ballistic tips "Silvertip". 22" barrel 1/10 twist at an altitude of about 1500 - 1700 Feet. The reloading book also has 1/10 listed for them I wonder if they will say something in the next Nosler book?
Good to know. Thank you. So...is there any downside to a faster than 10 twist? I know you gain the ability to better stabilize the longer, heavier bullets (and possibly the 95 gr NBTs) with the faster twists ...but is there anything you give up by going from a 10 twist to a faster twist? Does the 10 twist stabilize the lighter bullets better?
Interesting. The altitude where I hunt can range from around 850 - 2800 feet. I had no idea that altitude effects bullet stabilization.
So...if I sight my rifle in at an altitude of 850 feet and then hunt at 2800 feet would there be a significant change in POI at 300 yards or less? Or is this more of an issue at longer ranges?Air is thinner at altitude than at sea level, reducing drag.
Very minimal at 300 yards with standardish cartridges (6.5 creedmoor)So...if I sight my rifle in at an altitude of 850 feet and then hunt at 2800 feet would there be a significant change in POI at 300 yards or less? Or is this more of an issue at longer ranges?
So...if I sight my rifle in at an altitude of 850 feet and then hunt at 2800 feet would there be a significant change in POI at 300 yards or less? Or is this more of an issue at longer ranges?
With 25+ years of hunting at varying elevations...it's never been an issue for me or any of the guys I've hunted with...but at least now I know to keep an eye on it.At 300 yards, I would say that humidity and temperature with a wood stock would affect POI more so than an elevation difference of a couple thousand feet.
With 25+ years of hunting at varying elevations...it's never been an issue for me or any of the guys I've hunted with...but at least now I know to keep an eye on it.
You may see a shift in your POI this is not due to the change in environmentalsWell, I can’t speak to the extent of POI change from zeroing in different elevations, but if you were to sight in on a high humidity summer day and then go hunt in an arid climate with low temperatures, that will change POI by an inch or more at 100 yards in some cases.
You'd get a long action receiver for a short action cartridge on both.Is there anything I would gain with the 8-twist versus a 10-twist other than the ability to stabilize bullets over 100 grains?