My primary defense ammo is 75gr TAP

Secondary is Q3131A.  If I sight my gun in with the 75gr, how much dif between the two will I see with the 55 at 50, 100, 200 yrds?

While ever rifle is different and barrel lengths come in all sizes (as ya gave no barrel or rifle info in your post) please don't take this a gospel.

I use both the 77grn SMK and the 75grn match HPBT rounds and plink w/ Q3131A, so this is info based on an LMT 14.5" 1/7 twist M4, zeroed at 50 yards using an Aimpoint ML2.

At 50 yards the difference is miniscule, in the 1/4-1/2" range.

At 100 yards the difference is about 1", (with the 55 being higher than both the 77 and 75)

At 200 yards the difference is only around 2", (again w/ the 55 being higher)

Hope this is some help, but with every rifle being different ya really should know what YOUR rifle's capabilities are in this regard and not trust heresay of other's rifles.

Mike

ps - as I been shooting the 77grn SMKs for quite some time now, one of the very first reasons I choose the Q3131A as my plinkin ammo was #1 it shot tighter in my rifles than XM193 and #2 the trajectorys w/ the Q3131A were very close to my 77SMK trajectories, making them easy to shoot using the same 50 yard zero.

thanks Mr wilson.. that was helpful as a guideline.  I will be shooting 16 inch barrel with 1:7

I have traj info for the 75 but I could not find any trajectory info on Winchesters site

Quoted: thanks Mr wilson.. that was helpful as a guideline.  I will be shooting 16 inch barrel with 1:7 I have traj info for the 75 but I could not find any trajectory info on Winchesters site

You'll find one here in the www.ammo-oracle.com, tacked to the top of this forum. It's for M193 and there's both 20" & 16" barrel lengths IIRC. Check it out.

Mike

+1 Mr Wilson


I zero my  m4 type LMT with LCM855 @ 50 yards

Black Hills blue box 77gr is right on it @ 50yrd

And at the BERM I can hit TIN CANS about 220yards with M193,75/77/M855

Where are you guy's getting the 75grn & 77grn ammo from?

Quoted: Where are you guy's getting the 75grn & 77grn ammo from?

I reload it.

Bob

Quoted: Where are you guy's getting the 75grn & 77grn ammo from?

MIDWAY because of the Fast service!      (Eric doesnt carry Black Hills YET? )

AMMOMAN for M193 and M855 also Handgun ammo