Bullet weight effect

[y-not]

I need to understand the effect of two different bullet weights using the same load specifications.
Lets say I load a round for 45acp with a 200gr. RN bullet and using the same components (case, primer, powder, charge, and OAL) except using a 230gn bullet.
Shooting from the same handgun
What should I expect to happen ?
The 230gr should be slower in fps, but because of the OAL of the bullet being longer than the 200gr. bullet, and seating it in the case with the same OAL as the 200gr. completed round, would that increase the fps ?

I'm interested in cause and effect or "what if" thinking.

[Sandspider500]

When you seat a heavier bullet deeper in the case, and use load data for a lighter bullet you can expect an increase in pressure. Even if you take the same weight bullet, let's use your 200gr rn as an example, and stuff it in the case deeper but still use the same powder charge, velocity and pressure will increase.

Why are you asking? This seems to be basic pistol hand loading info.

[Sandspider500]

Hmmm

[Sandspider500]

Something weird going on here........

[jimmykan]

Buy the QuickLOAD software and experiment virtually to your heart's content:

https://quickload.co.uk/?currency=USD

[Spyder]

I've taken bulk 165/180 bullets and loaded them in 40 in bulk on the Dillon with no problems, and bulk mixed 115/124 bullets for 9mm. But I did research to find a safe load that was within book parameters for both of them, and it was all for pretty close steel target work where minor velocity variances didn't matter. I never chrono'd them so couldn't tell you which was faster.

[y-not]

When you seat a heavier bullet deeper in the case, and use load data for a lighter bullet you can expect an increase in pressure. Even if you take the same weight bullet, let's use your 200gr rn as an example, and stuff it in the case deeper but still use the same powder charge, velocity and pressure will increase.

Why are you asking? This seems to be basic pistol hand loading info.

I was just thinking about this "what if" situation while I was drinking my morning coffee watching the sun come up over the mountains.
That's just my inner process improvement engineer mind at work. Looking at all the factors involved in making a finished round and what effect different components have on the performance of the round.
I will probably stop thinking at a "standard" load and don't go down the rabbit hole of precision long distance ammo, even if it sounds interesting.
Thanks for your verification of what happens.

[Sandspider500]

There was an equation made by vihtavuori powder company, it was in one of the lee reloading manuals, I forget which one. I'll look for it, but I think it was for bottle neck rifle cartridges.

[Sandspider500]

Found it, Modern reloading by Richard Lee 1st edition page 105.