Hey guys! I am looking to start reloading for 6MM ARC and doing some PRS shooting. Where do most find the sweet spot for bullet weight vs velocity? Run the heaviest while still maintaining supersonic to target range?
Projectile weight vs velocity for long range
- Thread starter DESi
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Most using the 6mms are using 105-115grn bullets for matches. Not sure how your rifle is set up or semi vs bolt etc so tough to say but somewhere in that range should work. You are just starting though so load whatever shoots good in the rifle and go shoot some matches.
OP
Will be a 20" 1/7 on a gas gun. I have noticed the same as far as weights go on most 6mm. I have seen most people can make any of those group good with one powder or another. So what is the ultimate goal? Heaviest while maintaining supersonic speed or even faster but give up weight to fight the wind or?
Some bullets do well going transonic so don’t stress the supersonic. I shoot 168 ELDs in my Tac .308 to over 1200 yards and you know those aren’t still supersonic. Lol
You want a good combination of speed and accuracy. For your rifle I would shoot the 105-108 bullets. It will give you decent velocity but still good BCs.
You want a good combination of speed and accuracy. For your rifle I would shoot the 105-108 bullets. It will give you decent velocity but still good BCs.
Jmoser
Well-Known Member
You have the twist to shoot anything over 105 you want in 6mm for the ARC. Start with what gives you the best groups and just dial in your trajectory accordingly. Not every bbl stabilizes every bullet the same regardless of theoretical BC etc.
OP
I have played with that before and it is about useless really. It only goes by your twist rate and not much else that I can tell. I played with the velocity numbers and put 500 FPS and told me I was GTG. Aside from that, what made you decide on 105's and at that speed?
Alot of people run dashers and other BR based cases at the 2800-2850 area. The trend in PRS has been slowing down bullets to try and get less recoil. You have your cartridge so don;t worry too much about what others are using for speed in different cartridges. Just run the best you can get and go for it.
If you can find any of the Hornady 105 BTHPs you should give them a try. They are easy to load and accurate.
If you can find any of the Hornady 105 BTHPs you should give them a try. They are easy to load and accurate.
OP
I am not worried about what other people run. I am trying to figure out why or how they got to that number. What trade offs are people making? They could run heavier to fight the wind, why run a 105? Everyone will give you suggestions of try this or try that. I am asking why?
Can't answer the quiz on the PRC. But, my 308 aggregate 800, 900 and 1000 scores went up around 10 points when I switched 175's for 190's.
I slowed mine down because it saves powder and the difference in wind was minimal. I shoot prs and the trend is to shoot them slow to see impacts and trace better. I know a guy who shoots the 110 atips in a BR at 2790 and he’s one of the best in country at prs.
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One word, recoil. People are trying to slow them down so less recoil as I said. That said with a properly set up rifle with a good brake you can spot impacts with most any bullet. With the case size of the ARC you would be lobbing in 115s. The 105-108 is a good area as it's good for BC and velocity and recoil reduction. What bullets you have now?
OP
Running factory 108's as that was I all I could get a hold of and gives me some brass to reload. I think I am going to try from 105 to 112 and see how it goes with a few different powders. I was just trying to gain a little knowledge going into this as far as what people have as a game plan when choosing. Pistol comp loads to me is no problem, but rifle I have never had to break down and study it like this. Thanks for your help!
How were the 108s working for you? They are a good bullet too. I use them in factory 6 Creed ammo and load them also for it.
Don't stress the load too much for being new in the sport. A lot of things like the positional shooting and time limit will effect you much more than a few BC points in a bullet. Grab a bullet that is accurate and easy to load and get some loads ready to go and go shoot. The practice will be huge in making matches better for you. I have been shooting "PRS" matches for 18 years and I can tell when I don;t practice I start to suck. LOL
Where will you be shooting matches? Where you practice?
Don't stress the load too much for being new in the sport. A lot of things like the positional shooting and time limit will effect you much more than a few BC points in a bullet. Grab a bullet that is accurate and easy to load and get some loads ready to go and go shoot. The practice will be huge in making matches better for you. I have been shooting "PRS" matches for 18 years and I can tell when I don;t practice I start to suck. LOL
Where will you be shooting matches? Where you practice?
OP
Went to Colemans Creek a couple weeks ago. Might go back this weekend if the weather permits. A buddy of mine has drug me into this and he mostly shoots bigger matches. I might try and shoot the Guardian match in October but I want to try and get in some 1 day maybe at Frontline. Where have you been going?
Frontline, Pigg River and VPRC mostly. I am a member at Coleman's Creek too but haven't been down in a while.
Shooting the one day matches at Frontline or others close by is a good way to get into it and learn for not a lot of money.
Shooting the one day matches at Frontline or others close by is a good way to get into it and learn for not a lot of money.