Testing loads Prone..

[chuckw2]

I only shoot prone, and want to start testing all of my loads at 300 yards prone instead of at 200 yards from a bench. How do I set my crono up to shoot prone?

ASA you out there, I know you shoot this way..

Chuck

 

[paulT]

chuck, Shoot mostly prone myself at 200 to 300 at home, longer distances at local range with my 308 and 243 barrels in my interchangeable Blaser Lrs2, using harris br bypod and a rear adjustable monopod in but, When i use crony prone i first level rifle on ground and zero rifle to target then i set crony around 5 feet from muzzel directly in firing line from muzzel to target, generaly if you sight crony from behind rifle towards target you can see if crony is in safe firing line, also remember that you want barrel to clear in height main body of crony, I set crony on level ground making sure that barrel clears crony body by 5 inches in height so no chance hopfully of lodging a bullet in it, Some very good groups can be obtained prone i like shoting that way, at my local range shooting my 243 with lapua scenars prone managed 5 shot group of .250 inch at 200 yards, am in process of obtaining a 243 barrel with a 1 in 8 twist to shoot the 105 scenars at longer ranges prone, regards paul T.Ireland.

 

[Asa_Yam]

Chuck,
Paul really summed things up. I operate my chronograph without the diffusers or supports - fewer things to shoot by accident. Alignment is good, though you have a little more freedom to move around to align yourself with the screens, compared to shooting off a bench,and a concrete one at that.

Distance from muzzle to screen can be important - too close, and you can get false triggering due to gas leaving the barrel before the bullet. Most chronograph manufacturers recommend a muzzle to screen distance of 10-15 feet for this reason.

Hope this helps.

Asa

 

[M700]

Like Asa I test most of my loads from prone, at the 300 yard line. I set the chronograph at 12' forward of the firing line, which is raised. It's easy to set it up on the tripod. I take time to actually make sure the bore clears the chronograph, while being aimed in on my target. It takes a few minutes to set everything up.

I keep the readout/keypad for the chronograph next to me, along with a notebook and pencil so I can make any notes I want w/o breaking position. Otherwise I'm setup just like I would be were I firing the prone part of a competition.

Regards, Guy

 

[memilanuk]

Chuck,

Possibly get a table-top tripod and see how low you can get it... sometimes the ground contour comes into play. The range that M700 & I shoot at... on the 300yd line it's almost impossible to shoot thru a chrono from a bench, as the 'line' is up on a berm, ~3' above the main surface of the range. Getting a chrono up another 3-4' is pretty tough... so it's either shoot from a bench at another portion of the range, or shoot from Prone,bipod/sling). If the ground was sloped differently... one might find themselves having to sit the chrono on the ground or dig out a hole for the tripod...

HTH,

Monte