Will my petload change if I change the bullet?

BJung · December 13, 2019, 02:18 AM

I have a pet load using Oregon Trail 9x19-122TC lead bullets. I have a box of Dardas 9x19-122TC bullets. What is your experience changing a bullet component of the same weight and style and it's effect from your original pet load?

std7mag · December 13, 2019, 03:07 AM

Copper jacketed, yes.
Lead of same weight and dimensions, yes/no/sort of.
I'm thinking as long as weight, dimensions are the same it may come down to the hardness.

I'm sure far wiser people than i will chime in.

David R · December 13, 2019, 06:28 AM

Probably.

David

jetinteriorguy · December 13, 2019, 06:34 AM

I have found in my experience with handguns at SD distances that different bullets with like weights shoot pretty much the same with a given load. This is in 9mm, .38sp, .357mag, and .41mag. Basically fairly rapid fire out to 10yds. On the other hand shooting magnums out to 100ds from both handguns and lever actions is a different story, then it's working up each load for specific accuracy in each gun.

Charlie98 · December 13, 2019, 09:18 AM

As 7mag said... yes/no/maybe.

Depends on a lot of things, including the ranges you are shooting them at, and the differences in bullet construction. I've found cast bullets a little less picky than jacketed bullets...

ligonierbill · December 13, 2019, 10:41 AM

Similar hardness, little or no change. But I get substantially different velocity from very soft (Speer swaged SWCHP) vs. hard (Oregon Trail) 158s in .38 Special.

reynolds357 · December 13, 2019, 11:16 AM

Quote:

Originally Posted by burbank_jung

I have a pet load using Oregon Trail 9x19-122TC lead bullets. I have a box of Dardas 9x19-122TC bullets. What is your experience changing a bullet component of the same weight and style and it's effect from your original pet load?

Yes it will

T. O'Heir · December 13, 2019, 02:10 PM

"...yes/no/sort of..." Applies to jacketed if your load is jacketed too. Cast loads to cast loads the alloy used matters.
However, like weights, jacketed or cast will be very close regardless. Who made the thing makes no difference. One loads for the weight and cast or jacketed.

gwpercle · December 13, 2019, 05:59 PM

If both bullets are : 122 grain , truncated cone , cast lead ... they are probably cast with commercial casting machines , not that many automated casting machines on the market, only three common manufacturers , chances are both casters use the same type machine and mould or mould number . Alloy hardness might vary, lubricant may differ , but that's a long shot and doesn't mean a lot .

If the bullets look identical or nearly identical , then your pet load should be fine .
Gary

**Unclenick** · December 13, 2019, 11:20 PM

I think I would add that if your thumbnail indents them equally for equal applied pressure and unless one is significantly better made than the other, you will be hard put to see a difference. If they are different hardnesses, the softer one will shoot slower because it doesn't offer as much resistance for the powder to build pressure against. But will it have a different POI? That depends. If it's used at a long-range (say, 100 yards), it will impact lower. At a 25 yard target, though, it won't be a big drop difference in a self-loader, and a revolver may actually compensate some for the lower velocity by recoiling up a little further in the longer time, the slower bullets take to clear the muzzle, thereby landing them in the same spot. I've seen that effect as far as 50 yards out, but by the time you get to 100 yards, slow has dropped more significantly.

December 13, 2019, 02:18 AM	#1
BJung Senior Member Join Date: December 5, 2019 Posts: 773	Will my petload change if I change the bullet? I have a pet load using Oregon Trail 9x19-122TC lead bullets. I have a box of Dardas 9x19-122TC bullets. What is your experience changing a bullet component of the same weight and style and it's effect from your original pet load?

December 13, 2019, 03:07 AM	#2
std7mag Senior Member Join Date: June 23, 2013 Location: Central Taxylvania.. Posts: 3,609	Copper jacketed, yes. Lead of same weight and dimensions, yes/no/sort of. I'm thinking as long as weight, dimensions are the same it may come down to the hardness. I'm sure far wiser people than i will chime in. __________________ When our own government declares itself as "tyrannical", where does that leave us??!! "Januarary 6th insurrection". Funny, I didn't see a single piece of rope...

December 13, 2019, 09:18 AM	#5
Charlie98 Senior Member Join Date: September 6, 2006 Location: Great state of Texas Posts: 1,077	As 7mag said... yes/no/maybe. Depends on a lot of things, including the ranges you are shooting them at, and the differences in bullet construction. I've found cast bullets a little less picky than jacketed bullets... __________________ _______________ "I have this pistol pointed at your heart!" "That is my least vulnerable spot."

December 13, 2019, 02:10 PM	#8
T. O'Heir Senior Member Join Date: February 13, 2002 Location: Canada Posts: 12,453	"...yes/no/sort of..." Applies to jacketed if your load is jacketed too. Cast loads to cast loads the alloy used matters. However, like weights, jacketed or cast will be very close regardless. Who made the thing makes no difference. One loads for the weight and cast or jacketed. __________________ Spelling and grammar count!

December 13, 2019, 11:20 PM	#10
Unclenick Staff Join Date: March 4, 2005 Location: Ohio Posts: 21,063	I think I would add that if your thumbnail indents them equally for equal applied pressure and unless one is significantly better made than the other, you will be hard put to see a difference. If they are different hardnesses, the softer one will shoot slower because it doesn't offer as much resistance for the powder to build pressure against. But will it have a different POI? That depends. If it's used at a long-range (say, 100 yards), it will impact lower. At a 25 yard target, though, it won't be a big drop difference in a self-loader, and a revolver may actually compensate some for the lower velocity by recoiling up a little further in the longer time, the slower bullets take to clear the muzzle, thereby landing them in the same spot. I've seen that effect as far as 50 yards out, but by the time you get to 100 yards, slow has dropped more significantly. __________________ Gunsite Orange Hat Family Member CMP Certified GSM Master Instructor NRA Certified Rifle Instructor NRA Benefactor Member and Golden Eagle

December 13, 2019, 06:28 AM	#3
David R Senior Member Join Date: January 2, 2015 Location: The swamps of WNY Posts: 753	Probably. David

December 13, 2019, 06:34 AM	#4
jetinteriorguy Senior Member Join Date: April 28, 2013 Posts: 3,175	I have found in my experience with handguns at SD distances that different bullets with like weights shoot pretty much the same with a given load. This is in 9mm, .38sp, .357mag, and .41mag. Basically fairly rapid fire out to 10yds. On the other hand shooting magnums out to 100ds from both handguns and lever actions is a different story, then it's working up each load for specific accuracy in each gun.

December 13, 2019, 10:41 AM	#6
ligonierbill Senior Member Join Date: May 20, 2007 Posts: 2,456	Similar hardness, little or no change. But I get substantially different velocity from very soft (Speer swaged SWCHP) vs. hard (Oregon Trail) 158s in .38 Special.

December 13, 2019, 05:59 PM	#9
gwpercle Senior Member Join Date: November 30, 2012 Location: Baton Rouge, Louisiana Posts: 1,752	If both bullets are : 122 grain , truncated cone , cast lead ... they are probably cast with commercial casting machines , not that many automated casting machines on the market, only three common manufacturers , chances are both casters use the same type machine and mould or mould number . Alloy hardness might vary, lubricant may differ , but that's a long shot and doesn't mean a lot . If the bullets look identical or nearly identical , then your pet load should be fine . Gary