POA/POI difference with different brand ammo

[BDeal]

There is no doubt that different loads have different POI

[xarcher]

The POI difference between TSS and conventional load on one of my guns is 8 inches at 40. 

[ShortMagFan]

Different lots of the same shells will be different too. I like to buy a bunch of whatever I figure out works


Sent from my iPad using Tapatalk

[fmf]

The POI difference between TSS and conventional load on one of my guns is 8 inches at 40. 

no doubt!  my preferred tss load in 12 ga and 12 ga longbeard xr's have about a foot difference in poi at 40 yards.  couple that with nerves and it is a clean miss if you don't know how your gun shoots different loads

[King Cobra]

After dialing in your hunting load shoot a target load up close and save the target or take a picture, then you can confirm sights with the same targets loads, one box will last a while!

Solid advice!  I do the same.

As previously mentioned pay attention to lot numbers on your field loads and TSS.

[Tom007]

After dialing in your hunting load shoot a target load up close and save the target or take a picture, then you can confirm sights with the same targets loads, one box will last a while!

Solid advice!  I do the same.

Amen here Ken, lot differences from box to box definitely occur

After dialing in your hunting load shoot a target load up close and save the target or take a picture, then you can confirm sights with the same targets loads, one box will last a while!

Solid advice!  I do the same.

As previously mentioned pay attention to lot numbers on your field loads and TSS.

As previously mentioned pay attention to lot numbers on your field loads and TSS.

Great advice here..

[Marc]

The POI difference between TSS and conventional load on one of my guns is 8 inches at 40. 

Vertical or horizontal?  Consistent or variable between shots?

I can entertain that a heavier projectile will drop more quickly, but I cannot wrap my head around a horizontal POI difference...  Some crazy wad that makes the shot shoot sideways???

[WV Flopper]

I personally have never had 8" either direction. But 2-3" Horizontal absolutely.

Vertical can be a good amount depending on distance.

[Old Gobbler]

Depends....

I've been told the ultra tight chokes as the payloads reach a condition of being "over choked" they start to "shift" on POI

I grew up in a machinist shop and I look at shotgun barrels with some  skeptical eyes ....I have seen a buddy's Winchester pump that the chokes were clearly 10 thousands off center to the interior bore , and let me tell you it shot 1 foot to the left at 40 yards ...I could imagine that various velocity and payload offerings would alter how that gun hit

I also have a remington sp10 and that choke to bore alignment is off by 3 thousands,  causing thr gun to be off 3 inches at 40 ....my relationship with that firearm is a love hate scenario

I would closely examine the choke alignment on your shotgun , if that isn't the culprit...possibly the choke is super tight ?

Shannon

[Old Timer]

Depends....

I've been told the ultra tight chokes as the payloads reach a condition of being "over choked" they start to "shift" on POI

I grew up in a machinist shop and I look at shotgun barrels with some  skeptical eyes ....I have seen a buddy's Winchester pump that the chokes were clearly 10 thousands off center to the interior bore , and let me tell you it shot 1 foot to the left at 40 yards ...I could imagine that various velocity and payload offerings would alter how that gun hit

I also have a remington sp10 and that choke to bore alignment is off by 3 thousands,  causing thr gun to be off 3 inches at 40 ....my relationship with that firearm is a love hate scenario

I would closely examine the choke alignment on your shotgun , if that isn't the culprit...possibly the choke is super tight ?

Shannon

Shannon, If alinememt if off can the barrel be corrected?

[Marc]

Depends....

I've been told the ultra tight chokes as the payloads reach a condition of being "over choked" they start to "shift" on POI

I grew up in a machinist shop and I look at shotgun barrels with some  skeptical eyes ....I have seen a buddy's Winchester pump that the chokes were clearly 10 thousands off center to the interior bore , and let me tell you it shot 1 foot to the left at 40 yards ...I could imagine that various velocity and payload offerings would alter how that gun hit

I also have a remington sp10 and that choke to bore alignment is off by 3 thousands,  causing thr gun to be off 3 inches at 40 ....my relationship with that firearm is a love hate scenario

I would closely examine the choke alignment on your shotgun , if that isn't the culprit...possibly the choke is super tight ?

Shannon

Shannon Thank you for the reply.

My take-away from your reply is that due to being harder and heavier, that these new dense shot materials are more sensitive to small imperfections in bore to choke alignment?  Due to being softer/more malleable, that lead is going to be less sensitive to a small alignment difference of bore to choke than TSS?  (I have certainly seen that the harder metals are more sensitive to constriction changes in choking than is lead)

Which would imply to me, that slightly tightening or loosening a choke could potentially create a shift in POI?  (I know when waterfowling, I am constantly hand-tightening my choke as it comes loose from shooting).  So 1/4 turn of a choke would make the pattern shift from say left to up?

[sswv]

thanks everybody for all the info and opinions. I did a lot of shooting yesterday just to see for myself. shooting my 870 21" 20ga and my 301 Stevens compact with the 22' barrel with 3" TSS #9's both a .568 choke. I had 4 different brands, 2 over-the-counter 1.5oz. One was 1100fps and the other was 1200fps. and two different custom shop loads both 1200fps. the two custom and the over-the-counter 1100fps hit pretty much dead on with each other. the over-the-counter 1200fps hit 4"s (give or take an inch) low and the funny thing, the shell that constantly hit low produced the tighter patterns by several more pellets in the 10 ring. all shots were at 40yds.

[Old Gobbler]

Depends....

I've been told the ultra tight chokes as the payloads reach a condition of being "over choked" they start to "shift" on POI

I grew up in a machinist shop and I look at shotgun barrels with some  skeptical eyes ....I have seen a buddy's Winchester pump that the chokes were clearly 10 thousands off center to the interior bore , and let me tell you it shot 1 foot to the left at 40 yards ...I could imagine that various velocity and payload offerings would alter how that gun hit

I also have a remington sp10 and that choke to bore alignment is off by 3 thousands,  causing thr gun to be off 3 inches at 40 ....my relationship with that firearm is a love hate scenario

I would closely examine the choke alignment on your shotgun , if that isn't the culprit...possibly the choke is super tight ?

Shannon

Shannon, If alinememt if off can the barrel be corrected?

only with sights .

[High plains drifter]

I always shoot 1.7/8 oz lead bbs or 2s.

[zelmo1]

Variables cause variations, pretty self explanatory. Different chokes, shot size/material and velocity all change the performance of your pattern. Does it make sense that a 2 oz load of #5 lead traveling at 1100 fps out of a .665 choke would shoot the same POI as a 2.25 oz load of #9 TSS at 1050 fps through a .675 choke? Every aspect is different. I want the best pattern at my hunting yardage as possible. I do a lot of pattern work to get where I want to be. In general, I start my loads at 1200 fps and adjust from there. That usually means lighter payloads generally. I shoot a 28, so 1.25 loads at 1180 shoot fabulous out of my set up. It's all about the performance and compatability for your set up. Do your homework and kill your animals cleanly, whatever does it for you consistantly is the right load for yoy. Have fun with the process and God Bless. Z