.2-.3 100 yard cold bore challenge

[Capt RB]

Don't have micrometer or caliper, but I think that 4-shot cluster at 200 is roughly 0.37 MOA, but it is definitely in the "3's". Will be interesting to see if I can repeat it next time out at the range.

.687-.243÷2.09=.212moa

 

[Jon Bischof]

.687-.243÷2.09=.212moa

I got 0.750" for diameter of dime, minus 0.255 for diameter of bullet = 0.247 MOA
But I sure like your cipher'n better!

 

[Capt RB]

Had 11/16 on my tape still a great great either way

 

[Jon Bischof]

Well, that does come out to 0.216 MOA. Maybe your tape is a more accurate measure. I was just using the diameter of the dime to calculate it. Can't wait to try it again. Anyway ya stack it, I am really happy with my new Sauer 100.

Had 11/16 on my tape still a great great either way

 

[Will16]

Five shots 100yd .460" Tikka .308

 

[GLTaylor]

Had to take my 6.5 CM apart to do some work. Put it back together and re-zeroed it.
Still shoots just fine.

 

[djfriesen]

Had to take my 6.5 CM apart to do some work. Put it back together and re-zeroed it.
Still shoots just fine.

I think those hammers are a cheat code. . .

Now if only there were some proof of terminal performance on game

 

[Rich Coyle]

Yes. I can hardly wait to see some field results.

 

[foul bore]

6mm creedmoor 5 shot cold and clean .617 5 shot, .208 3 shot 5 shots tell the truth

 

[foul bore]

View attachment 170270 View attachment 170271 View attachment 170272 View attachment 170273
Dedicated is right. 28 this morning here in Texas. Went out to fire form more of my 338 NM IM. ( Christmas present ). 33 when I got to shoot. Knee caps jumping, nose dripping. I'm not cold tough. First five at 100. Last 3 at 496. 4" head.

what part of Texas are you in? Im just east of Abilene

 

[imartin]

Finally got a chance to get to the range. My 7mm RM was completely clean, and the shooter was completely cold after not being behind the trigger for a while. Cold clean bore shot was low and left (1st pic), the next 4 grouped (2nd pic). This was with some factory federal blue box 150 gr ammo I had laying around.
~.8 inch group center to center
~.3 c to c
3rd pic is 3 shots of a 140 gr vld load
~.3 c to c
and the last pic is 5 shots from ladder looking for max charge, so 5 different powder charges.
~.7 c to c
I let the barrel cool at least 5 minutes between each shot, since the cold bore shot is what counts.

 

[Rich Coyle]

It works.

 

[Jon Bischof]

imartin: I usually fire a few before going hunting so that my first shot on a deer will not be from a clean barrel. Your rifle shoots great after the first fouling shot. You probably already know, but I would be interested to know if your rifle doesn't keep that first shot with all the others if you begin with a fouled cold barrel. My .270 WSM behaves that way so I try to shoot it before going hunting (need the practice too!).

Finally got a chance to get to the range. My 7mm RM was completely clean, and the shooter was completely cold after not being behind the trigger for a while. Cold clean bore shot was low and left (1st pic), the next 4 grouped (2nd pic). This was with some factory federal blue box 150 gr ammo I had laying around.
View attachment 173131 ~.8 inch group center to center
View attachment 173132~.3 c to c
3rd pic is 3 shots of a 140 gr vld load
View attachment 173133~.3 c to c
and the last pic is 5 shots from ladder looking for max charge, so 5 different powder charges.
View attachment 173134~.7 c to c
I let the barrel cool at least 5 minutes between each shot, since the cold bore shot is what counts.

 

[imartin]

imartin: I usually fire a few before going hunting so that my first shot on a deer will not be from a clean barrel. Your rifle shoots great after the first fouling shot. You probably already know, but I would be interested to know if your rifle doesn't keep that first shot with all the others if you begin with a fouled cold barrel. My .270 WSM behaves that way so I try to shoot it before going hunting (need the practice too!).

Yeah, if the bore was fouled it would have been in there with the other 4.