Jump to content
Brian Enos's Forums... Maku mozo!

Shooting 147s with a Shadow


Nimitz

Recommended Posts

... so I want to get my gun sighted in for my current load & forget about it ...

That's my goal as well! My main concern was that I can't reliably get any particular powder for loading, my supply spread out over three different types (n320, titegroup, 4756). So if I ultimately can't trade to be all the same, I figured the adjustable rear will help me compensate for any changes as I go between powders, when one runs out and I move to the next.

Link to comment
Share on other sites

  • Replies 53
  • Created
  • Last Reply

Top Posters In This Topic

ok so I loaded up some 147s and tested them for POA/POI at 10, 15, 20 & 25 yds but I'm not sure if I have an issue or not ....

At 10 yds I shot a 1" x 1 3/4" group just slightly left of center

At 15 yds: one 2" x 2 3/4" group centered 1 1/2" left & 1" high, & one 2 1/2" x 3 1/2" group centered 1 1/2" left & 1" high

At 20 yds: one 3" x 2 1/4" group centered 3" left & 1 1/2" high & one 2 1/2" x 2 3/4" group centered 2 3/4" left & 2" high

At 25 yds: one 4 1/2" x 4 1/4" group centered 4" left & 1/2" high & one 1" x 4" group centered 3" left & 0" high

I was shooting these all off hand since when I shoot from a bench rest I always get different results. Now, while the groups are ok I can't really tell if it's me or the sights causing the off center groups .... I tend to think it's me but can't be sure at the moment ...

I'll try to post some pics which may make it easier to see ...

Link to comment
Share on other sites

well if it's windage you need to fix that can be done with the fixed sights by just moving the rear sights in the dovetail. you can the adjust height if need be by buying the different height front sight.

even if it is you (as in the way you see the sights). if it's consistently off centre then you need to adjust the sights.

the rears can be bloody hard to move though. you may need someone with one of the little rear sight adjustment tools (like a mini clamp set-up).

Link to comment
Share on other sites

ok so I loaded up some 147s and tested them for POA/POI at 10, 15, 20 & 25 yds but I'm not sure if I have an issue or not ....

At 10 yds I shot a 1" x 1 3/4" group just slightly left of center

At 15 yds: one 2" x 2 3/4" group centered 1 1/2" left & 1" high, & one 2 1/2" x 3 1/2" group centered 1 1/2" left & 1" high

At 20 yds: one 3" x 2 1/4" group centered 3" left & 1 1/2" high & one 2 1/2" x 2 3/4" group centered 2 3/4" left & 2" high

At 25 yds: one 4 1/2" x 4 1/4" group centered 4" left & 1/2" high & one 1" x 4" group centered 3" left & 0" high

I was shooting these all off hand since when I shoot from a bench rest I always get different results. Now, while the groups are ok I can't really tell if it's me or the sights causing the off center groups .... I tend to think it's me but can't be sure at the moment ...

I'll try to post some pics which may make it easier to see ...

Shooting from a rest or sandbags or the hood of a pickup truck tells you where the gun's mechanical aim point is. If you shoot to a different point when you shoot offhand, it is the shooter making the difference.

Once you know those two points, you can adjust your sights or trigger pull or sight picture to accomodate.

ballistic_trajectory_chart_e7766c8b.png

There's a trajectory chart for a 147gr 9mm round shot at 915fps. You can see that the 10 and 25 yard distances are both POA=POI. Everything else is relatively close until you go beyond 35 yards.

Edited by RaylanGivens
Link to comment
Share on other sites

ok so I loaded up some 147s and tested them for POA/POI at 10, 15, 20 & 25 yds but I'm not sure if I have an issue or not ....

At 10 yds I shot a 1" x 1 3/4" group just slightly left of center

At 15 yds: one 2" x 2 3/4" group centered 1 1/2" left & 1" high, & one 2 1/2" x 3 1/2" group centered 1 1/2" left & 1" high

At 20 yds: one 3" x 2 1/4" group centered 3" left & 1 1/2" high & one 2 1/2" x 2 3/4" group centered 2 3/4" left & 2" high

At 25 yds: one 4 1/2" x 4 1/4" group centered 4" left & 1/2" high & one 1" x 4" group centered 3" left & 0" high

I was shooting these all off hand since when I shoot from a bench rest I always get different results. Now, while the groups are ok I can't really tell if it's me or the sights causing the off center groups .... I tend to think it's me but can't be sure at the moment ...

I'll try to post some pics which may make it easier to see ...

Shooting from a rest or sandbags or the hood of a pickup truck tells you where the gun's mechanical aim point is. If you shoot to a different point when you shoot offhand, it is the shooter making the difference.

Once you know those two points, you can adjust your sights or trigger pull or sight picture to accomodate.

ballistic_trajectory_chart_e7766c8b.png

There's a trajectory chart for a 147gr 9mm round shot at 115fps. You can see that the 10 and 25 yard distances are both POA=POI. Everything else is relatively close until you go beyond 35 yards.

very cool graph. though is it perhaps 1115fps? as 115fps is much slower than any of us would be shooting these projectiles.

do you have a similar graph for 135gn and 124gn by any chance?

Link to comment
Share on other sites

very cool graph. though is it perhaps 1115fps? as 115fps is much slower than any of us would be shooting these projectiles.

do you have a similar graph for 135gn and 124gn by any chance?

I don't shoot 147's... I picked 147gr @ 915fps to make a graph for Nimitz.

You can make your own trajectory graphs with any bullet/fps combination using the Shooters Calculator web site:

http://www.shooterscalculator.com/ballistic-trajectory-chart.php?

It's a nice visual tool to display a bullets trajectory as it travels down range.

Link to comment
Share on other sites

very cool graph. though is it perhaps 1115fps? as 115fps is much slower than any of us would be shooting these projectiles.

do you have a similar graph for 135gn and 124gn by any chance?

I don't shoot 147's... I picked 147gr @ 915fps to make a graph for Nimitz.

You can make your own trajectory graphs with any bullet/fps combination using the Shooters Calculator web site:

http://www.shooterscalculator.com/ballistic-trajectory-chart.php?

It's a nice visual tool to display a bullets trajectory as it travels down range.

thanks for the link. :)

Link to comment
Share on other sites

  • 1 month later...
  • 4 weeks later...

I had to ream my chamber out a bit to fit Montana Gold 147 CMJs loaded to 1.130OAL. I did that based on a mechanical fit test using a fired casing the way its explained all over this forum.

I used E3 powder and got the following results with D650 press:

3.15g = Average 867fps / 127.5PF

3.25g = Average 898fps / 132 PF

I had decent grouping with both of them but decided to stick with MG 124JHP based manly on the fact that I could get an extra 750 124gr bullets for the same price and I could't detect any significant difference in my shooting when I clocked a few drills.

Link to comment
Share on other sites

  • 5 months later...

shot some 147s this morning

147 Xtreme RN plated

3.8 WST

1.143 OAL

131 PF

3" groups at 25 yds

Thanks for the info. I've been trying to find a good load for the Extreme 147s with WST. I was surprised the profile let me go as long as 1.19" in my TS. I backed down to 1.16" with 3.5gr but good to know I've got some room.

Link to comment
Share on other sites

shot some 147s this morning

147 Xtreme RN plated

3.8 WST

1.143 OAL

131 PF

3" groups at 25 yds

Thanks for the info. I've been trying to find a good load for the Extreme 147s with WST. I was surprised the profile let me go as long as 1.19" in my TS. I backed down to 1.16" with 3.5gr but good to know I've got some room.
I made it to the range today. 1.16" oal with 3.5gr WST cycled, BUT was not accurate. 25 yards thru my CX4 with 4x scope was 6-8 inch spread. To compare my usual load 124gr w/ 4.0gr @ 1.08" oal groups around 1-2".

Any suggestions? I feel going much shorter with the Extreme 147gr RN will start to compress the powder which I've read is not desireable, especially with WST.

Edited by IronicTwitch
Link to comment
Share on other sites

  • 3 weeks later...

Which bullets? The profile is what matters. 147 Bayous run just fine through mine at 1.135". I don't know how far out I can go, but I know that they still drop free at 1.140". They will shoot high, so you might want to change your front sight. I have a .170 Dawson on mine.

I changed my front sight to Dawson .195 for 147. I had .175 and it shoots high.

What this for POA/POI at 25 yards?

Edited by ES13Raven
Link to comment
Share on other sites

I use 3.3 gr. of N320 for 132ish PF.

i use the same load but 147 BBI. They shoot great!

Adjustable sights can and do break from time to time.

Fixed sights once you take the time to dial them in can be rock solid

I havent broken an adjustable rear yet and hope i never do. i slammed by rear sight on a low port at Nats, i think i got away with a lucky one but thats why its always good to have a back up! My buddy did lose the rear adjustment screw (not sure how that happen).

Link to comment
Share on other sites

You should go over 150gr. and use a faster powder (careful uploading).

There you begin to recognize, that the felt recoil melts down like butter in the sun.

I did this with 153gr. Ares bullets and N320 or No.2, it is amazing.

:ph34r:

Link to comment
Share on other sites

I broke my HAJO rear last weekend and swapped it out for a fixed competition rear. Paired with the factory installed 7.5mm front and shooting my 147 BBI handloads, it shot low. Approx 3" low at 20 yards. I ordered a 6.5 and 7.0mm front from CZC and will report back with results.

post-25014-0-17535500-1414970580_thumb.j

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • advertisement_alt
  • advertisement_alt
  • advertisement_alt


×
×
  • Create New...