Place your bets

[cavedweller]

This is probably old to you old timers so forgive me:

I've been helping someone setup their new HFT gun... we are setting up his dope using Strelock Pro for expediency
And then taking actual shots.

We've settled on JSB 13.4s moving at 815 FPS
Yep, there are (Exact and Redesigned)..... and we are going to compare both here

The Redesigned have a B.C. of .030 according to Strelock
the Exacts have a B.C. of .026 according to Strelock

Initially, as an oversight on my part.... i entered the Exacts info into the Strelock APP and created my dope with them, although i was actually shooting the Redesigns.

at 10 yards.... the Redesigns P.O.A. is 2.3 or 23 clicks Mrad.
at 10 yards.... the Exacts P.O.A. is 2.2 or 22 clicks Mrad.
i was suprised by the one click difference at 10 yards

I actually took 63 solid shots off a bench using the Exacts dope, while shooting the Redesigns; all target fell ( yes hole size varies ).

Here's the bet - where will you place your money?

If i put out a paper target at 55 yards and shoot 10 rounds of Exacts and 10 rounds of Redesigns using my "redesigned dope" and then "Exact dope" do you think I'll see a difference down range in my Point of Impact at 55 yards? Do you think the dope with the two differing B.C.'s will show up consistently down range? It's only math right?

Exacts dope says: 1.7 Mrad or 17 clicks at 55 yards
Redesigned dope says: 1.6. or 16 clicks at 55 yards

Chime in,,,, this could be a fun or nonsensical thing... dunno.

 

[Lewis]

My question would be, what is the click value at 50? If it is 1/4", it may take quite a few shots to gather a real feel for the difference and ignore personal bias one way or another.
In any case, I am super curious to see what you find out.
Has either shown an accuracy advantage?

 

[SciueraPlumbea]

My question would be, what is the click value at 50? If it is 1/4", it may take quite a few shots to gather a real feel for the difference and ignore personal bias one way or another.
In any case, I am super curious to see what you find out.
Has either shown an accuracy advantage?

.18" 1/10 Mil.

if your results are anything like mine the MRDs will pack tighter. IN my 17.7:1 .177's 55yrds at similar velocity is where the cylinder monsters became useless.


.2 lower with the cylinders. .32 groups

Thats what i get. My scope height is 2.2"

 

[Bramezy]

unless its so controlled you wont see a difference. locked in a vice on a bench in no wind etc...
Glad someone found these to not spiral for them past 25yds.

 

[Solo1]

I think the bc difference is really inconsequential only shooting to 55 yds now take it to 100 and its making a difference. To me the mrd’s real advantage is their diameter as they fit more barrels well

 

[Franklink]

That's a very small difference in BC. That's a small enough difference that the variance in how his particular barrel likes one or the other could swallow up that BC difference.

 

[maxtrouble]

That's a very small difference in BC. That's a small enough difference that the variance in how his particular barrel likes one or the other could swallow up that BC difference.

This right here. I do not think the BC will affect the accuracy. It will be down to what pellet the barrel likes more.

 

[cavedweller]

That's a very small difference in BC. That's a small enough difference that the variance in how his particular barrel likes one or the other could swallow up that BC difference.

Thanks for the input everyone....
I am quite happy with the 13.4 R/D's performance in Norman's BW, but for chagrins and to teach both myself and Norm a little something... I'm going to set out a target at 55 yards and let Norm shoot 10 round groups with 10 different pellet choices and weights so he can see first hand how they group / perform. Should be interesting... great thing about AGN is you can always glean good info from people who have already gone down the B.C. path.

 

[maxtrouble]

Thanks for the input everyone....
I am quite happy with the 13.4 R/D's performance in Norman's BW, but for chagrins and to teach both myself and Norm a little something... I'm going to set out a target at 55 yards and let Norm shoot 10 round groups with 10 different pellet choices and weights so he can see first hand how they group / perform. Should be interesting... great thing about AGN is you can always glean good info from people who have already gone down the B.C. path.

Looking forward to the results!

 

[woogie_man]

Probably won't see anything on the target. If they are both accurate I would shoot them in the wind and see which does better. If they are the same....go with the cheaper option