Fieldcraft Loophole practice

[Mach1pilot]

Been working on a new skill to me of Loophole shooting... Worked out a big part of the math and it is interesing how small a hole you can work through... Smallest hole so far has been 1/2 inch wide by 1.5 inches tall to 300 yards....

 

[Alpine 338]

What distance to the hole?

 

[Mach1pilot]

3 to 6 yards from the muzzle...

 

[mountainman308]

Want to walk us through the fundamentals?

 

[Gunfighter14e2]

Been working on a new skill of Loophole shooting... Worked out a big part of the math and it is interesing how small a hole you can work through... Smallest hole so far has been 1/2 inch wide by 1.5 inches tall to 300 yards....

What cal/bullet speed are you shooting an what is your mechanical offset? The reason I ask is I'm throwing a 190smk at 3150 with a offset of 2.02" an it takes me 2.25 of vert opening to not show any dusting (if block or concrete) an hit a target at 300yds from 3 yds back. Wood w/no insulation I can get away with 2.0 at same/same. Farther back a little less but not much,...

 

[Mach1pilot]

https://www.snipershide.com/shooting/threads/loophole.6253216/

It was the basis of where I started. Developed a spreadsheet to handle the calcs.

 

[Mach1pilot]

308 cal. Been working on this some last summer..

 

[Mach1pilot]

Some of my earlier work.

 

[Mach1pilot]

I use political signs so if I clip a side I don't get a huge deflection. The one clip was my friend who misjudged the width. .5 inch for a .308 bullet leaves not alot room.

 

[Gunfighter14e2]

FYI,....Getting a projo thru a hole is one thing, getting one thru a hole w/o leaving a signature is something totally different.

 

[Mach1pilot]

What cal/bullet speed are you shooting an what is your mechanical offset? The reason I ask is I'm throwing a 190smk at 3150 with a offset of 2.02" an it takes me 2.25 of vert opening to not show any dusting (if block or concrete) an hit a target at 300yds from 3 yds back. Wood w/no insulation I can get away with 2.0 at same/same. Farther back a little less but not much,...

My Scope height is 1.95 inches... Running about 2800 fps in my 308... with your offset of 2.02 my calculator shows that if you back up to 8 yards muzzle to barricade you should be able to get through a 1.66 inch high hole minimum...

 

[Gunfighter14e2]

My Scope height is 1.95 inches... Running about 2800 fps in my 308... with your offset of 2.02 my calculator shows that if you back up to 8 yards muzzle to barricade you should be able to get through a 1.66 inch high hole minimum...

Getting threw the hole is not the only issue, you need to be aware of. I have L/H data for all sticks an have seen the slow mo video shots from the other side. Not being able to detect the shot, is more important than the size of the hole you using, an remember in nature nothing is square or round.

 

[Mach1pilot]

Getting threw the hole is not the only issue, you need to be aware of. I have L/H data for all sticks an have seen the slow mo video shots from the other side. Not being able to detect the shot, is more important than the size of the hole you using, an remember in nature nothing is square or round.

Yes I understand that part... but crawl walk run... Its a interesting excercise and confidence builder... Are you refering to suppressing the shot to hide the shot? or to use a natural hole/ building feature to work out of like a crack/break/design feature?

 

[Gunfighter14e2]

Are you refering to suppressing the shot to hide the shot? or to use a natural hole/ building feature to work out of like a crack/break/design feature?

All the above.

 

[Mach1pilot]

I got the suppressed part covered. Perhaps I will do another sheet with jagged holes to try next. I do find with the holes fixed it becomes an exercise to get in the proper position and get stable. Using props and multiple bags, it can get interesting.

 

[Chesapeake]

Care to post any of the videos?

 

[Gunfighter14e2]

M1P
Any type of cordage works well in a pinch, as does a few other things easy to carry.
I heard there was once a guy who was really, really good. However he fail to understand how air movement combined with dust can be a flag waving. Rumor was he got tagged via iron sights from a 100% FNG. Just remember mulligans don't happen in some games of tag.

 

[Gunfighter14e2]

Care to post any of the videos?

Never kept them past reviewing, but they are easy to make with today's phones. When we did it it was old 8mm stuff. We started with mirrors but you waste ammo/time getting them setup like that. Down range is the best an many times the best view is from 70-90* of the shot, at least that what we found. If you can't see it from 90* it will not be seen DR unless it's a spot your looking directly at with a S/S when the shot goes off. Some of the more inventive stuff is a single strobe pulse, in another location that is sound activated, just encase they have the heavy junk to being it all to a stop quickly.

 

[Mach1pilot]

You ever do a shot where you could not see the target due to the hole size/distance to target where a spotter called the shot?

 

[Gunfighter14e2]

Nope,...

 

[GrantB]

The ballistics program Field Firing Solutions has all that built into it. Doing it the old way takes time that you may not have in the field, but it’s good to know how to do it outside of a program.

 

[TheGerman]

There's pages of math about it all over the place, but its A. super confusing and B. stop doing math when shooting.

To do it manually, if I remember right, it was simplified to this:

- Figure out your corrections to target (elevation and wind) in the system your reticle uses
- Figure out your distance to loophole (LRF or you still carry that roll up measuring tape with you, right?)
- Dial your elevation
- Reference where the bullet is above the barrel (in the system your reticle uses) when it reaches the loophole distance at your dialed elevation/ballistic solution to target's elevation. Do the same for wind (in 90% of the times, your loophole is close to you so this part wont matter).
- Put your reticle on target. Bracket it for the correct wind call via your reticle subtensions.
- Hold the reticle center on the target and bracket left/right for wind. Now look on your reticle; do your two reference 'points' (one for elevation, one for wind) clear the loophole? If yes, GTG. If no, you need to increase/descrease distance to loophole and/or find a different one that is higher/lower/bigger, etc.

 

[Curt193]

You ever do a shot where you could not see the target due to the hole size/distance to target where a spotter called the shot?

Dead space or defilade shots are fun too. Spotters in a position to see the target. Communicates a mill hold to an object in reference to the target hold off that and smack the target.

 

[TheGerman]

You ever do a shot where you could not see the target due to the hole size/distance to target where a spotter called the shot?

PID requirements would normally not allow you to do this. Also, its extremely rare to be in a position where you couldn't relocate the gun or view angle on the target space. This is something we taught in that, make sure you can see the area your target should be in, but also around it.

I also wouldn't take this shot because if the guy on the spotter was wrong, that sets me up for the possibility of a lot of problems.