Recipe For 165 GR Hornady XTP in a .45ACP(thats right 165gr weird huh)

[krunchnik]

Just wondering if any of our reloading guru's have a recipe for Hornady 165 Gr XTP in .45 ACP.Preferably with Unique powder.I cant find any info at all for this.Possibly in one of Hornady's older reloading manuals.Info would be gratefully appreciated.My dad gave me about 300 of these he had laying around.And yes they measure .451 and weight in at 165gr.

[Caster]

Certainly weird, I bet they are cooking velocity wise for a 45 auto!

Sorry, I can't be of help.

[I_Like_Pie]

When using a light caliber bullet you are safe with using data with the next heavier bullet...granted there isn't a large difference in weight. The 185gr data in both of my Lyman manuals read 4.7 - 7.5 of Unique.

Being such a low pressure round I would have no hesitation at all starting right in the middle of that at 6 grains with a 165 grainer. You will most certainly have trouble finding any official test data on such a light bullet. Would bet money on it being under a 15,000 psi loading.

No matter what you do it is going to shoot really low in your guns.

[dlm37015]

what i like pie said is rigby but i am sure in my reloading room i have the info i will check tomorrow

[Guest Lester Weevils]

When using a light caliber bullet you are safe with using data with the next heavier bullet...granted there isn't a large difference in weight. The 185gr data in both of my Lyman manuals read 4.7 - 7.5 of Unique.

Being such a low pressure round I would have no hesitation at all starting right in the middle of that at 6 grains with a 165 grainer. You will most certainly have trouble finding any official test data on such a light bullet. Would bet money on it being under a 15,000 psi loading.

No matter what you do it is going to shoot really low in your guns.

Hi Pie

Would that be because the faster round will have a flatter trajectory or will "get to a close target too soon" before it can rise the correct amount?

I have a 9mm 1911 that shoots a couple of inches low at 12 yards with 115gr typical velocity ammo. And doesn't have adjustable sights.

Reckon a 147gr typical velocity 9mm load would tend to hit higher?

[krunchnik]

Thanks,I think I will try the 6 grains of Unique.range report to follow,I hope.

[I_Like_Pie]

Hi Pie

Would that be because the faster round will have a flatter trajectory or will "get to a close target too soon" before it can rise the correct amount?

I have a 9mm 1911 that shoots a couple of inches low at 12 yards with 115gr typical velocity ammo. And doesn't have adjustable sights.

Reckon a 147gr typical velocity 9mm load would tend to hit higher?

You are correct about the 9mm shooting higher.

Here is why - Heavier bullets are both moving slower and resisting the push of the powder burn more due to their higher mass (thus generating more recoil). This means that the barrel will be a little bit higher when the bullet exits and making point of impact a bit higher. It isn't that drastic in 9mm because the spread from heavy to light bullets isn't that great, but when you are shooting heavy calibers the difference can be drastic. For example Hot 200 grain .44 magnum loads will shoot several feet lower than 300 grain sledgehammers at 50 yards.

Typical .45 colt loadings are around 250 grains and 165 grainers would have a very different point of impact.

[Guest Lester Weevils]

Thanks for the good info, Pie

Interesting that recoil would be a factor in the aim point. I had suspected that it might be, because obviously action-equal-and-opposite-reaction ought to begin as soon as the bullet starts to move, rather than when it exits the barrel. Though the jet of gas immediately after exit would likely add to the recoil impulse?

But I had read so many people claim that recoil doesn't affect aim because the bullet has already left the barrel before recoil begins. Maybe the majority of recoil does happen after the bullet has left the barrel, but not all of the recoil?

[I_Like_Pie]

It doesn't take much movement at all to affect POI....thousandths of an inch makes a difference. action/reaction begins once that primer starts burning fuel.