Ivey Adjustable base with Sightron SIII 10-50 on 6.5 CM

[newageroman]

Just ordered an Ivey base, something I've been drooling over for years. Any thoughts opinions/experiences on the Ivey - please share. roast or toast IDC.

My range has 1250 max, I have shot 1k there before, but never made it to the 1250 plate. 1 mile with my own equipment ammo is the eventual goal.
I have a RAP 6,5 CM that has like 2500 rounds down it and will be the host. I normally shoot 130 bergers at 2900 for long range stuff. I don't have any more of those to load so will have to be 140 Match Burners for now.

I'm %90 set on the scope which is Sightrons SIII 10-50. This way the glass $$$ is spent ONLY on Glass and Turrets, none of the other do-dad BS. It's only a 30mm tube compared to the other bigger tube scopes. I don't have much wind at my range, but if I use the Ivey for primary elevation it should keep me able to stay in the center of the scope and have windage I need, or I can dial wind if needed some.

So that is the plan, thoughts?
I called Ivey this morning and they said they ran about 300 units last year. Perhaps I'm missing something here, but it seems this thing might open a lot of ELR doors for those that have half way decent scope already but just need more elevation.

One last thought - I currently have a 20MOA base on the RAP, should I just leave it on for a total of 220MOA? I think I'll take it of and put the flat base on so the numbers will be easier.

 

[badassgunworks]

6.5 creed is not a elr cartridge. Elr starts at 1500 yards so for all practical purposes your done before you even start.

 

[White Death]

I have an ivey mount on a cadex defense shadow .375 with a NF atacr. I haven't been able to fully stretch it out to it's capability but the mount is great.
Only complaint was that it took 8 weeks to get it when I already had everything else.
You'll be happy with it.

 

[newageroman]

Sweet, thanks for the feedback guys. I was a bit unsure at first, but they said they shipped around 300 units last years so something is going right.
pics when it happens.

 

[khdudley13]

freind has an ivey.. it seems to work well ... used it to 2800 yrds so far... i've been looking for one of the nightforce prisms in 100 moa.. thought i would take that approach.. ??

 

[newageroman]

So in the meantime I'm going to research on work up some loads that will stay supersonic, and also other heavier ones that might be better for trans sonic.

As far as the Scope goes I do prefer the Second Focal Plane scopes, but I have a question about mag and mirage.
Shooting 1 mile what mag would you tend to use/prefer?
and related,
Do you get mirage with high mag more which forces you down to lower mag range often.
Sightron has 24x(pass) 32x(maaaaaybe) and 50x(YES! ALL THE MAG!)

 

[Rocketmandb]

As far as the Scope goes I do prefer the Second Focal Plane scopes, but I have a question about mag and mirage.

Your spotter says, "Adjust .3 mil right" - with a SFP scope, what do you do?

Shooting 1 mile what mag would you tend to use/prefer?

At a mile, you shouldn't need to go above high teens in mag.

Do you get mirage with high mag more which forces you down to lower mag range often.
Sightron has 24x(pass) 32x(maaaaaybe) and 50x(YES! ALL THE MAG!)

Higher mag will tend toward higher impact from mirage. If you're only going to a mile, you don't need more than 24x. I rarely go above 20, even out to 2k+. Usually I only go to max mag on my 25 - 27x mag scopes is if I'm measuring through the reticle or helping to spot and I don't feel like getting up from my rifle to go a spotting scope.

 

[White Death]

General rule of thumb I use is 1x of magnification per 100 yards so a mile would be 17 or 18x.
And I'd recommend 1st focal plane.

 

[newageroman]

Your spotter says, "Adjust .3 mil right" - with a SFP scope, what do you do?



At a mile, you shouldn't need to go above high teens in mag.



Higher mag will tend toward higher impact from mirage. If you're only going to a mile, you don't need more than 24x. I rarely go above 20, even out to 2k+. Usually I only go to max mag on my 25 - 27x mag scopes is if I'm measuring through the reticle or helping to spot and I don't feel like getting up from my rifle to go a spotting scope.

yeah, that's why I was asking about mirage. I've had it happen some with another 20x scope but it was bearable most of the time actually. I may go more to the 32x but like you mentioned, I would like to use this as a spotter some too. My only optic above 24 right now is a spotting scope and I've never shot high mag scoped rifle really more than a round or 2 where barrel mirage wasn't an issue.

I'm thinking that the lenses would be best near max mag, so might consider the 32x. I guess I could get out the spotting scope and set it to 32x and then do some simulated heating/mirage tests and range some targets. I need to find a good observing target from the backyard, all the good ones are 700 and in or the hillside 5 miles away.
I just ordered some Flatline 123 bullets, but alas, they are on backorder as well.

If someone tells me .3 mil right, I will just tell them "please remember that I specifically mentioned I only shoot/call MOA or inches to you before you agreed to spot for me."

 

[Rocketmandb]

If someone tells me .3 mil right, I will just tell them "please remember that I specifically mentioned I only shoot/call MOA or inches to you before you agreed to spot for me."

Mil/MOA - same basic question. If you have a SFP scope, then you're locked into adjusting your turret. With a FFP scope you can simply adjust through the scope and let another one fly without having to change anything on the rifle.

And if someone is calling correction in inches... well, they shouldn't be spotting.

 

[newageroman]

I don't like how the FFP scopes cover the target on high zoom. I like seeing the bulletholes i'm aiming at - thus I prefer SFP. I will have dope cards for the distances that I shoot and they will include inches/MOA conversion at that distances/zoom.

So for your example if someone told me 6MOA to the right, I would just hold that on the reticle, no scope dialing. If the scope is on a zoom that is not setup for the MOA reticle to be accurate, I will just change zoom to get the hashes to line up and take the shot. There will be some learning the dope and windage of course, but once I have all that dialed in and doped, it should be just Ivey for elevation and hold for wind. That's the plan anyway, thanks for the input/info.

I also ordered some 123 6.5 Flatline bullets, but they are on backorder, so another waiting game...

 

[Rocketmandb]

So for your example if someone told me 6MOA to the right, I would just hold that on the reticle, no scope dialing.

The point is that you can't do that in an SFP scope unless you fire at a specific zoom, but then you have to measure/convert for different settings.

To each his own, but if you were to put a poll on this site for FFP vs SFP for 1 mile+ shooting, I don't think you'd get many (any?) people using SFP. There's a reason for that.

 

[Rocketmandb]

I have an ivey mount on a cadex defense shadow .375 with a NF atacr. I haven't been able to fully stretch it out to it's capability but the mount is great.
Only complaint was that it took 8 weeks to get it when I already had everything else.
You'll be happy with it.

Do you find that the adjustment knob for the Ivey gets in the way of the parallax adjustment on the scope? I was looking at the Ivey for my upcoming 37XC build (waiting on barrel and action), but ultimately decided to go with a March Genesis instead (waiting on that too).

 

[newageroman]

Yes, I get that most people like FFP scopes and I know why, I just like weird shit and different style of thinking. I also like to be told something can't or shouldn't be done and then trying it anyway to see how/why.

For instance - I also have a penchant for fixed power scopes where most people just have to have variable. I shoot an AR-15 from 100 to 1000 yards with no dialing of the fixed scope, just hashes/holds - I know it's not a typical setup, but it works for me.

 

[White Death]

Do you find that the adjustment knob for the Ivey gets in the way of the parallax adjustment on the scope? I was looking at the Ivey for my upcoming 37XC build (waiting on barrel and action), but ultimately decided to go with a March Genesis instead (waiting on that too).

The knobs are close but once you get used to it, it's not an issue.

 

[newageroman]

Sightron SIII 10-50 MOA-1 ordered and should be here next week. The Flatline Bullets showed up today. I spoke to my LR mentor and he said there are a couple better choices for 6.5 bullets but I cant remember the name of them ATM. But that is all based on his big bullets 33XC I think.

 

[GIXXER2000]

Here is what my AI_PSR looked like with the Ivey. I could dial way past I could shoot.

 

[Steel head]

Yes, I get that most people like FFP scopes and I know why, I just like weird shit and different style of thinking. I also like to be told something can't or shouldn't be done and then trying it anyway to see how/why.

For instance - I also have a penchant for fixed power scopes where most people just have to have variable. I shoot an AR-15 from 100 to 1000 yards with no dialing of the fixed scope, just hashes/holds - I know it's not a typical setup, but it works for me.

You can easily get a good calls system with your spotter with SFP
You can make calls using the target as a reference size- 1 target low and 1/2 target right.
You can also tell your spotter what your reticle at its current magnification reads across the target and they can draw a diagram and map/call impacts.
Neither are as easy FFP calls but entirely usable.

 

[newageroman]

Glass is here, but ivey base will be next week.
I have a 600 match tomorrow so will be running the poverty pony.
My range has 4x4 lg plates and 12"x12" center plates at each yardage so MOA references are somewhat not-difficult.
for the scope, at 24x, the hashes are 1MOA and at 48x it is .5MOA here is an example dope/ref card

 

[newageroman]

little surprise showed up Friday afternoon. Got it mounted and to the range today! I shot a 600 match with 6ARC, and then tested this bebe out to 1250!

started at zero 100/200, then held reticle elevation out to 300, then used the base elevation adjustments to 45MOA to get to 1250 with my bullet. It actually worked pretty good, save for the height. It is so tall now that I just shoot right handed and sight with my left eye (which is dominant).

After the match everyone left, the wind died and I had the LR pavillion to myself. Scored 4/5 hits on my last 5 bullets (I actually had more ammo, but was limited and no dope past 600 for those). So I was able to see my hits at 1k alright through my scope on 24x, but at 1250 the mirage was so bad that I couldn't see hits, so I listened, nothing... I tried the last few with some elevation adjustments and looking and listening and still nothing. Dejected and alone, I started packing my stuff. the I happened to glance up at the monitor for the 1250 plate and saw the string of hits. HA, what a feeling!

I was able to spot some bullet traces at the match which is another thing I've been trying to get better at. Its been years since I saw one of those. I may have a line on a place to try a mile but my groups will need some tuning. Still I'm pretty impressed with the lack of horiz dispersion on those rounds. At least some of the vertical is due to me making elevation adjustments, so not bad considering things.

 

[newageroman]

OK, I got the 123 FlatLines loaded. I normally do a pair of bullets for each powder load to test for pressure, but since these are expensive, I loaded just 5 rounds to test for velocity. I'm still thinking I will be subsonic with the 22" RAP barrel at 1800 yards but we will see. I do have a couple of follow up questions though...

When I was loading these, I considered forgoing mag length and single feeding them, something I've never really done, but I get it now. I was able to load the FL123s out to 2.995" (guessing my throat is eroded due to ~2500 rounds). The brass is fully prepped/neck bushing sized, cleaned. With this bullet loaded long, my main question is where is the ideal seating depth of the base of a BT bullet in reference to the shoulder/neck? The angle of the Boat Tail on the bullet is ~200 above the transition from the shoulder to the neck. Basically all the bearing surface is in the neck of the brass. This seems more efficient to me and would also allow more capacity. Would it be better for stability/efficiency for the angle of the boat tail to start right where the neck and shoulder meet? I've never loaded bullets quite this long, I know I'm off the lands but what else should I consider?

If ordering another barrel specifically for copper solids, could you up the twist rate a bit to help keep the projectiles stable through the transonic zone? I'm thinking more twist energy will keep it more stable through the boom right? Does the standard twist rate barrel formula assume supersonic, or thus does it factor higher spin rates and copper solids for increased stability throughout the transonic zone.

I'm drooling over 300PRC. Can I just find any Rem 700 LA and get a remage barrel, or does the 300PRC require a special lenght action over LA? I'm new to 700s...

 

[Steel head]

Standard LA 700 is fine for 300PRC
For solids I run a dedicated barrel,1-8 right now but one on order is a 1-7 for my 338.

 

[newageroman]

OK, I'll be scoping out old LAs then...what caliber would have the same bolt head/face and thus need another less part for the transformation?

 

[Steel head]

Any Standard magnum cartridge as that’s what 300PRC has.

 

[jasent]

I’ve never felt handicapped by sfp scope. Corse 99% of the time I’m spotting for my self

 

[newageroman]

Same... as far as spotting goes. I can't hardly drag people to my range.
Running errands at lunch(including the fun shop)...I'll be looking for old LA 700s and savages.
Hoping to get some chrono results this weekend. I just body sized and mandrel sized 500 6ARC cases.

 

[newageroman]

Well, this challenge has morphed a bit. I managed to get a 300PRC used so that is now the "mile-rifle" and have moved the IveTron setup over to that rifle.

So now what to do with this 6.5CM? I think for now I will plop an ATN on it and try to get some footage and see if that scope will work from 600-1k.
I will most likely end up shooting this rifle more than the 300PRC at my range so I want something decent glass on it. But its got ~3k rounds down and need a chassis too, so that's a lot of money to throw at an old Ruger.

I may just end up swapping the IveyTron back and forth as needed. I REALLY like the Dial base & hold reticle option and want to work that out more in a faster paced environment with varying yardages to really test the unit. If I went that way I'd really just need a better chassis for now. ponderings...

Also I had an interesting conversation with my ELR mentor about yardage limits to copper solids. My question was do copper solids wobble more when going through the transonic zone as opposed to traditional lead bullets (higher SD)? His reply was yes, which if that is the case, the max distance I can get with the 123 FLs is around 1600, not 1800... so these may not be the best bullets for a mile. Still need to chrono the FL bullets. I also made up about 40 neck turned cases with Barnes 140MBs over H4350 to try out as well.