What's the closest zero you can get with that 70 moa rail ? In other words 400,500,600 etc.
Adjustable Scope Bases/Rings for ELR
- Thread starter jbone405
- Start date
dmoran
Donovan Moran
All depends on what scope and the amount of elevation travel it has. A lot of indifference in travel.
Having the reticle as close to "optical center" can aid greatly in parallax and clarity, is another positive to having optimal MOA in the base, for the primary distances one will be using them at.
Donovan
I agree scope travel matters. Just want a reasonable idea. Guess the math is easy enough. 40 moa base and 35 moa internal travel gets me about a 500 yard zero and about 2k range with 10 minutes left on the turret. My range is 500. I want a 500 yd zero.
dmoran
Donovan Moran
@284winner
For a 500yd primary target distance, likely a 10-MOA base would "optical center" many scopes.
Donovan
For a 500yd primary target distance, likely a 10-MOA base would "optical center" many scopes.
Donovan
Yep it's about right
Concussion? I have made them move firing a .44 mag next to the scope. This scope test using 2 scopes is just so simple and relatively cheap, plus you dont need a "labratory". I could start calling deep creek a "lab" howeverGo look at the scope checking thread for all the details. When you can mount 8 of the same scopes and they are all rock solid that tells you the rings are good. While 8 of a different model all move and in the same direction, well thats pretty solid data. March scopes do have an excellent track record by the way. I'd bet March fully supports this test. The reason March exists is because of people long before me used/invented this test to realize there was a big problem with scopes moving. Thats why we have March. Not to worry, Im done posting results. Dont need the grief, I just want to know for me and my customers.
I am actually putting together data on different methods used, and how users are double checking the math. Or proofing the data. I am up to about 4 different methods now. I am also looking a new method for testing turret tracking in the field. Nothing good or bad, just how people have decided to do things. Then checking it against some engineers, and what their thoughts are. So that it can all be brought together to better help shooters in the long run.
Dusty Stevens
Shiner
if they used a scope checker they may would re-vamp their laboratory. it would open their eyes as to what they think is acceptable and their standards. they sold a ton of fixed power scopes their first few years.
XTR
F-TR obssessed shooting junkie
@DocUSMCRetired you are almost a yr late to the scope testing party here. It's been going on long enough that people have had time to start fabricating testing mounts for sale, and they are popular among some of the BR guys.
What kind of price are you going to be asking for this base? If you don't mind me asking. I will add it to my original post.
When I first started shooting the 1000 yard steel plate matches at Rayners when they first ran them there were three of us that were old IHMSA silhouette shooters and wanted to use pistols for the matches. I still had two old XP-100 bolt action guns in 260 rem and 7-08. This was about 8 or 9 years ago and everyone was still trying to figure out what worked, I put Burris 12x pistol scopes on mine with a VGM mount made by Chris Self in Selma Alabama.
https://www.fieldandstream.com/blogs/gun-nut/2009/12/petzals-miracle-scope-base
Told him what I was wanting to do and he'd never heard of putting one on a pistol but was interested in seeing how it would do. His mount has 5 positions you can preset with a dial caliber using calculations. He also made me one of his very limited 10 position mounts contoured for an XP action. Initially I had first position set for zero at 100 yards, position 2 at 250 yards, position 3 at 500 yards, position 4 at 750 yards and position 5 at 1000 yards. Then use sub-tensions in scope for the in between distances.
Later on I switched to rear grip chassis and SWFA 5-20HD rifle scopes and was able to dial any distance even out to a mile with the 6mm and 6.5mm calibers. I later used them on my longrange rimfires and also a Freedom Arms 44 mag I was experimenting with for really longrange experimentation.
It was very precise and well built, would always be spot on when put into any of the preset positions. It was sent with about 120moa of travel but with a slight bit of machining near the back pivot pin it would be capable of 240 moa of travel.
Chris is retired now and no longer makes these. I don't think there are many out there. It's built like a tank, the only problem that he said he's ever had was the one on my Freedom Arms 44 mag. It actually started to strip the grooves where the pins hold it to the picatinny mount. He had me send it back and custom made me a SS one that matched the gun with additional pieces that fit the grooves perfectly to lock it solid.
He's had these on 50 BMG rifles but the recoil on the revolver was harder on it than the big rifles. After the modification it's held up perfectly with no movement and exact settings when I slide it to various positions and tighten the lock. I have it set for 100, 200, 300, 400 and 500 yards preset positions and with the 2 1/2-8 Leupold with custom turrets lets me dial all the in between distances.
One day at Rayners I hit 4 out of 5 on a standard IPSC target at 500 yards, my Son duplicated that and Tom, the owner of the Range also hit 3 out of 5 at that distance. JD Jones has shot it and made hits at 500 yards, he'd never seen one of Chris' mounts but had worked on a similiar design for his SSK company but never put it in production.
With the modern scopes of today and for most applications this type of mount isn't needed even to a mile but for distances way out there is would be a good option to really stretch it out. I think more manufactures are making adjustable mounts so there may be other options but back then there weren't many and this one filled my needs and did it very well.
Topstrap
https://www.fieldandstream.com/blogs/gun-nut/2009/12/petzals-miracle-scope-base
Told him what I was wanting to do and he'd never heard of putting one on a pistol but was interested in seeing how it would do. His mount has 5 positions you can preset with a dial caliber using calculations. He also made me one of his very limited 10 position mounts contoured for an XP action. Initially I had first position set for zero at 100 yards, position 2 at 250 yards, position 3 at 500 yards, position 4 at 750 yards and position 5 at 1000 yards. Then use sub-tensions in scope for the in between distances.
Later on I switched to rear grip chassis and SWFA 5-20HD rifle scopes and was able to dial any distance even out to a mile with the 6mm and 6.5mm calibers. I later used them on my longrange rimfires and also a Freedom Arms 44 mag I was experimenting with for really longrange experimentation.
It was very precise and well built, would always be spot on when put into any of the preset positions. It was sent with about 120moa of travel but with a slight bit of machining near the back pivot pin it would be capable of 240 moa of travel.
Chris is retired now and no longer makes these. I don't think there are many out there. It's built like a tank, the only problem that he said he's ever had was the one on my Freedom Arms 44 mag. It actually started to strip the grooves where the pins hold it to the picatinny mount. He had me send it back and custom made me a SS one that matched the gun with additional pieces that fit the grooves perfectly to lock it solid.
He's had these on 50 BMG rifles but the recoil on the revolver was harder on it than the big rifles. After the modification it's held up perfectly with no movement and exact settings when I slide it to various positions and tighten the lock. I have it set for 100, 200, 300, 400 and 500 yards preset positions and with the 2 1/2-8 Leupold with custom turrets lets me dial all the in between distances.
One day at Rayners I hit 4 out of 5 on a standard IPSC target at 500 yards, my Son duplicated that and Tom, the owner of the Range also hit 3 out of 5 at that distance. JD Jones has shot it and made hits at 500 yards, he'd never seen one of Chris' mounts but had worked on a similiar design for his SSK company but never put it in production.
With the modern scopes of today and for most applications this type of mount isn't needed even to a mile but for distances way out there is would be a good option to really stretch it out. I think more manufactures are making adjustable mounts so there may be other options but back then there weren't many and this one filled my needs and did it very well.
Topstrap
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X-Caveman
Gold $$ Contributor
All these lack is bead blasting. Should be shipping by 3/30. As of this moment I have one 50 MOA & two 100 MOA available from this test run (perhaps only run???). If you want one, send me a PM. If still available after blasted, I'll list them in the classifieds here.
Phil
Gold $$ Contributor
I really like my rings and bases from Murphy Precision, they make great stuff, no issues with doing custom things either.....
X-Caveman
Gold $$ Contributor
All 50s are spoken for. 2 100’s available.
The Charlie TARAC:
The base unit has three screws that are loosened - one screw for adjusting - tighten the three screws. That is the "moving parts".
Yes- it has optics that can potentially fail- so does the scope.
It has 650moa of internal travel.
It is instantly transferable from gun to gun.
Adapters will allow it to go to any scope, or a rail unit can be used (the main body can take either style).
Absolutely no position change is needed by the shooter.
It has successfully engaged at over 4000yds with <3/8 moa variability in the whole system/platform. This has been done on multiple platforms- back to back- same unit on different rifles.
The newest version has over 1200moa (yes 1200moa) of capability.
The turret version will have 8 settable points through the ranges noted.
The same adapter can take a secondary unit to take your 100moa rail and 1000yd zero back to 100yds- faster than you read this sentence.
While we are being compared to adjustable rings or stacking bodies (LaRue also makes such items) our target market was the tactical market. In the time it takes to bolt on or bolt off a series of units or stackable bases- reconfirm zero- we could engage 2500m targets, shoot, put the unit on another rifle, repeat several times ... rifles in the same time period
While we are not bench shooters - we do shoot groups that overlap in partial bullet diameters- all of the units are expected to allow the platform to perform the same with or without a TARAC unit.
We shot at Fort Chaffee last week at the vendor day for the sniper competition- we took a unit out of its case, never been on a gun, stuck a rail adapter on it from another unit, had two army shooters (shooter/spotter) behind our 300Norma, put the 50mil unit on the gun, dialed 6.3mil pulled the trigger and dropped within 1mil (1mil low 1 mil right) second shot was a hit on a man size target. Range 3247meters. Not a prairie dog I agree...
John
TACOMHQ.com
The base unit has three screws that are loosened - one screw for adjusting - tighten the three screws. That is the "moving parts".
Yes- it has optics that can potentially fail- so does the scope.
It has 650moa of internal travel.
It is instantly transferable from gun to gun.
Adapters will allow it to go to any scope, or a rail unit can be used (the main body can take either style).
Absolutely no position change is needed by the shooter.
It has successfully engaged at over 4000yds with <3/8 moa variability in the whole system/platform. This has been done on multiple platforms- back to back- same unit on different rifles.
The newest version has over 1200moa (yes 1200moa) of capability.
The turret version will have 8 settable points through the ranges noted.
The same adapter can take a secondary unit to take your 100moa rail and 1000yd zero back to 100yds- faster than you read this sentence.
While we are being compared to adjustable rings or stacking bodies (LaRue also makes such items) our target market was the tactical market. In the time it takes to bolt on or bolt off a series of units or stackable bases- reconfirm zero- we could engage 2500m targets, shoot, put the unit on another rifle, repeat several times ... rifles in the same time period
While we are not bench shooters - we do shoot groups that overlap in partial bullet diameters- all of the units are expected to allow the platform to perform the same with or without a TARAC unit.
We shot at Fort Chaffee last week at the vendor day for the sniper competition- we took a unit out of its case, never been on a gun, stuck a rail adapter on it from another unit, had two army shooters (shooter/spotter) behind our 300Norma, put the 50mil unit on the gun, dialed 6.3mil pulled the trigger and dropped within 1mil (1mil low 1 mil right) second shot was a hit on a man size target. Range 3247meters. Not a prairie dog I agree...
John
TACOMHQ.com
If I may ask" for what ELR/caliber would you need 240 minutes of elevation and an additional 40 minutes of holdover?
SPJ
Depends on what you are shooting. The March Genesis scope is a 6-60 FFP with 400 minutes of internal elevation. That means you can shoot a rimfire at 1000 yards, or a 6.5x47L at 2 miles. While the .375s are pretty cool, some people just want to plink at 1 mile, and ELR Rimfire matches have been scheduled on the books this year as well.
Got it!
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