6 PRC with N570

[wind gypsy]

Yeah I do man. But it’s a 700 footprint, so it’ll be a while I think. They have a pile of tikka inlets to fill

Thought they were different molds?

Good input on tested BC. AB had the 109s measured down around 0.282 IIRC so interesting to hear they tested a bit better than that for you.

 

[huntnful]

Thought they were different molds?

Good input on tested BC. AB had the 109s measured down around 0.282 IIRC so interesting to hear they tested a bit better than that for you.

You’re probably right. I didn’t follow the thread too closely on the molds and stuff.

Yeah I shot a pretty solid 9 shot zero at 100 yards and then drove straight to 1000 yards. Conditions were good as well.

Could always be some small errors in the mechanics of optics or me personally causing higher impacts as well.

 

[bergerking21]

thanks for sharing the info. I enjoy reading about your different rifle adventures. 6 prc is cool option. if you estimate 20-25 fps/in you'd be about 3,220 on a 20" barrel, so about 100 fps slower than a 6 um. most of those guys are getting 3,350? not too shabby
plugged it into recoil calc and was 14.8 ft lbs. for reference same calc puts 6.5 creed w/ 140 eldm at 11.3, 6.5 prc w/ 140 at 17, and a 7 prc w/ 180 at 24 ft lbs (9.5lb rifle)
at 5k ft elevation: for 10 mph wind drift w/ g7 of .295 for the 109 at 3300 fps, at 600 yards only 0.28" more wind drift vs 7 prc with 180 eldm at 2850 fps

 

[huntnful]

thanks for sharing the info. I enjoy reading about your different rifle adventures. 6 prc is cool option. if you estimate 20-25 fps/in you'd be about 3,220 on a 20" barrel, so about 100 fps slower than a 6 um. most of those guys are getting 3,350? not too shabby
plugged it into recoil calc and was 14.8 ft lbs. for reference same calc puts 6.5 creed w/ 140 eldm at 11.3, 6.5 prc w/ 140 at 17, and a 7 prc w/ 180 at 24 ft lbs (9.5lb rifle)
at 5k ft elevation: for 10 mph wind drift w/ g7 of .295 for the 109 at 3300 fps, at 600 yards only 0.28" more wind drift vs 7 prc with 180 eldm at 2850 fps

No problem at all dude! Its half the fun that keeps me occupied in the off season.

Yeah pretty good performance with N570.

I think once I shoot up all this stuff I have loaded with H1000, I’ll switch it over to N570 for hunting season just for the hell of it lol

 

[T_Widdy]

Just trued up those 109 ELDM’s at 1000 yards. Using the advertised .295 G7 BC, the centerline of my group was 3” above the bullseye. I shot 9 shots, and they held 4” of vertical dispersion. So the data is decently solid. Have to add 20 FPS to my data to actually bring the group down.

A 6mm .295 G7 BC bullet going 3300+fps is pretty legit.

@huntnful are you still using .295 bc? On my new 6 I need to either be at .357 G7 or raise my speed 100 fps from my actual.

 

[huntnful]

@huntnful are you still using .295 bc? On my new 6 I need to either be at .357 G7 or raise my speed 100 fps from my actual.

If you’re using a good chrono, I’d double check your zero or possible scope tracking?

Yes I just shot it yesterday at 1260 yards and the .295 G7 was still spot on

 

[T_Widdy]

If you’re using a good chrono, I’d double check your zero or possible scope tracking?

Yes I just shot it yesterday at 1260 yards and the .295 G7 was still spot on

Thanks! I’m going to try it tomorrow at 1000, today was 400,500 and 815. I’ve only got 50 rounds on this barrel. I’ll do another 10 round zero, I might be .1 mil high. Using a garmin and maven rs1.2 that tracks perfect on the rifle it was on before.

 

[huntnful]

Thanks! I’m going to try it tomorrow at 1000, today was 400,500 and 815. I’ve only got 50 rounds on this barrel. I’ll do another 10 round zero, I might be .1 mil high. Using a garmin and maven rs1.2 that tracks perfect on the rifle it was on before.

Damn, IDK then dude. That just seems like it would be quite the change from baseline numbers for sure. But as long as zero is good, and you true it to impacts at 1000, and then it lines up at 500 also, I guess it just is what it is haha. The calculator needs to spit out the right info based on real impacts one way or another.

I also used to get bunk data by shooting long range in East or West directions and not accounting for Coriolus. Just something to think about. It can put you .1-.2 high or low in that 1000-1200 yard area. Just something to consider before making drastic data input changes

 

[wind gypsy]

Damn, IDK then dude. That just seems like it would be quite the change from baseline numbers for sure. But as long as zero is good, and you true it to impacts at 1000, and then it lines up at 500 also, I guess it just is what it is haha. The calculator needs to spit out the right info based on real impacts one way or another.

I also used to get bunk data by shooting long range in East or West directions and not accounting for Coriolus. Just something to think about. It can put you .1-.2 high or low in that 1000-1200 yard area. Just something to consider before making drastic data input changes

unseen up/down drafts, aerodynamic jump, notable velocity changes between range sessions, etc can mess a guy up.

 

[T_Widdy]

Damn, IDK then dude. That just seems like it would be quite the change from baseline numbers for sure. But as long as zero is good, and you true it to impacts at 1000, and then it lines up at 500 also, I guess it just is what it is haha. The calculator needs to spit out the right info based on real impacts one way or another.

I also used to get bunk data by shooting long range in East or West directions and not accounting for Coriolus. Just something to think about. It can put you .1-.2 high or low in that 1000-1200 yard area. Just something to consider before making drastic data input changes

3 different apps all gave me the same dope. I thought it might be the wind but from 400 out I was hitting constantly .4 mil high. I do shoot straight west but have never had a calculator be off that much. I’ll see if I can figure it out today. Thanks for your help!

 

[huntnful]

Yeah .4 at 400 wouldn’t be anything environmentally related to the calculation. That’s a lot. Was the mirage bad? I’ve had super off impacts when shooting in bad mirage

 

[huntnful]

unseen up/down drafts, aerodynamic jump, notable velocity changes between range sessions, etc can mess a guy up.

Absolutely. That’s why I try and look a lot more considerations before making a drastic ballistic change that doesn’t line up with my gathered data just to get my impacts right.

Shooting east at 1000 yards with a 5mph right to left wind and having a zero just .1 high will now have you hitting .3 high and then you calculate that out with ballistic inputs and your shit is a mess once you switch to different environmentals lol

 

[T_Widdy]

Yeah .4 at 400 wouldn’t be anything environmentally related to the calculation. That’s a lot. Was the mirage bad? I’ve had super off impacts when shooting in bad mirage

There was no mirage that day, just wind.

I lowered my zero .1 added 55fps to my calculator and it’s true from 300 out to 980 yds now.

Have you killed with the 109 yet?

 

[huntnful]

There was no mirage that day, just wind.

I lowered my zero .1 added 55fps to my calculator and it’s true from 300 out to 980 yds now.

Have you killed with the 109 yet?

That's not too far fetched then!

I haven't killed with the 109's yet. But I'm fixing to hopefully kill a buck or 2 with them this year. I killed a muley with the 108's last year, and they performed great. So I can only assume with 109 will act the same way.

 

[khuber84]

There was no mirage that day, just wind.

I lowered my zero .1 added 55fps to my calculator and it’s true from 300 out to 980 yds now.

Have you killed with the 109 yet?

Have you measured your bore height to optical center? Having it off by 0.2" will change your dope at 550y by 0.1 mil and on out to distance. The more it's off the closer in it can be affected.

My method of doing so: pull bolt to rear measure gap between bolt and scope tube, add that value plus half of bolt diameter, and half of scope tube diameter. If it's a 20 moa base, I then remove 0.05 from that calculated value to account for angle of drop at the breach. Bought a cheap set of Pittsburg telescoping id gauges at harbor freight for getting that measurement between bolt/scope as usually caliper ID jaws will not fit for accurate measurement.

 

[T_Widdy]

That's not too far fetched then!

I haven't killed with the 109's yet. But I'm fixing to hopefully kill a buck or 2 with them this year. I killed a muley with the 108's last year, and they performed great. So I can only assume with 109 will act the same way.

I’m in the same boat, good luck this year!

 

[T_Widdy]

Have you measured your bore height to optical center? Having it off by 0.2" will change your dope at 550y by 0.1 mil and on out to distance. The more it's off the closer in it can be affected.

My method of doing so: pull bolt to rear measure gap between bolt and scope tube, add that value plus half of bolt diameter, and half of scope tube diameter. If it's a 20 moa base, I then remove 0.05 from that calculated value to account for angle of drop at the breach. Bought a cheap set of Pittsburg telescoping id gauges at harbor freight for getting that measurement between bolt/scope as usually caliper ID jaws will not fit for accurate measurement.

I use calipers and do it the same way you do.

 

[huntnful]

I’m in the same boat, good luck this year!

You too man!!

I have a 7-300 NMI shooting 180 Bergers at 3130fps and a new 26" 6 PRC shooting 109's at 3350fps and I'm honestly more excited to test the 6 PRC haha.

 

[T_Widdy]

You too man!!

I have a 7-300 NMI shooting 180 Bergers at 3130fps and a new 26" 6 PRC shooting 109's at 3350fps and I'm honestly more excited to test the 6 PRC haha

Nice! I was planning on using my 22 creed but this new 6prc has me tempted to use it.

Yours is screaming with a 26”! I’m at 3100 with a 20.

 

[huntnful]

Nice! I was planning on using my 22 creed but this new 6prc has me tempted to use it.

Yours is screaming with a 26”! I’m at 3100 with a 20.

Yeah I'm at 60gr. N570 in the new barrel. It's just starting to crack and speed up a little. It started just over 3300 with the same load when the barrel was brand new