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.311 vs .312 174gr Bullets

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105GunGrunt View Drop Down
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    Posted: February 15 2020 at 12:38pm
I have always been a big fan of Sierra MatchKings so when I started loading my No 4 I went with Sierra’s .311 174gr.

Now I see that Hornady makes a .312 174gr.

Has anyone compared the two?  A rough test of my No 4 barrel shows it has about 1/2 to 3/4 of its life left.  Would the larger bullet be a better fit for older rifles?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Goosic Quote  Post ReplyReply Direct Link To This Post Posted: February 15 2020 at 1:03pm
I have just recently tested a 200grn .310 FMJBT against the Hornady 174grn .312 HPBT.  The first photo is the .310 FMJBT bullets, the second photo is the .312 174grn BTHP bullets.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote britrifles Quote  Post ReplyReply Direct Link To This Post Posted: February 15 2020 at 1:17pm
I wasn’t able to detect any difference between the .311 SMK and .312 Hornady Match for 10 shot groups at 200 yards from my No. 4 which has a barrel measuring .3035 across the lands and a .314 groove depth.  10 shot group sizes center to center extreme spread 2 MOA or slightly better on a good day.  


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Post Options Post Options   Thanks (0) Thanks(0)   Quote Honkytonk Quote  Post ReplyReply Direct Link To This Post Posted: February 15 2020 at 2:53pm
Either load or group would make me proud! Venison on the table! Man, can you guys shoot!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote pisco Quote  Post ReplyReply Direct Link To This Post Posted: February 15 2020 at 8:14pm
i use the hornady .312” and they work better then any thing else i have used
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Post Options Post Options   Thanks (0) Thanks(0)   Quote britrifles Quote  Post ReplyReply Direct Link To This Post Posted: February 16 2020 at 5:46am
Pisco, have you also shot the Sierra MatchKing?  If so, how much better did the Hornady shoot?  Are you able to gage the bore of your rifle?   





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Post Options Post Options   Thanks (0) Thanks(0)   Quote Honkytonk Quote  Post ReplyReply Direct Link To This Post Posted: February 16 2020 at 6:41am
My No4 Mk2 Sniper clone shoots the Sierra MK 174's slightly better than the PPU 174 FMJ's. It also shoots 180 gr Sierra Prohunters well. Since I only have access to basically a 100 yard range, I'll probably stick to a non BT. In my experience in tuning in my Enfields, matching bullet weight (150 vs 174/180) to a rifle is most important. My L42 clone (.303) just wouldn't group 180's, but I took the advise from this forum and tried 150 gr Hornady spire points and it was like magic! Good shooter now! I recently loaded up a bunch of Hornady .312 174gr RN and am looking forward to see how they shoot. Wicked looking projectile...
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Post Options Post Options   Thanks (0) Thanks(0)   Quote britrifles Quote  Post ReplyReply Direct Link To This Post Posted: February 16 2020 at 7:37am
The two No. 4s that I tried the Sierra 180 PH bullet, neither would group, strung vertically.  One of these days, I’ll experiment further with it (different powder/charge weight).  Must be a tuning issue.  

The 174 gr SMK has been accurate with several medium burn powders over a broad range of muzzle velocities in my No. 4 rifles.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote pisco Quote  Post ReplyReply Direct Link To This Post Posted: February 16 2020 at 6:44pm
i have never used the sierra i have been using some old taipans 
if i remember correctly my bore is .313”
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