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View Poll Results: Choose one please
.323 195-grain Hornady 3 21.43%
.338 225-grain Accubond 4 28.57%
.358 250 Partition 3 21.43%
.375 260 Accubond 4 28.57%
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Which would you pick... and WHY
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Old 02-22-2008, 02:30 PM
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gitano gitano is offline
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Default Which would you pick... and WHY

I'm not looking for THE answer here, rather just your opinions. I'm curious about what people think with respect to specific cartridge characteristics when constraints are applied.

What we have here is the 7.5x55 case necked up to .323, .338, .358, and .375. Bullets have been chosen based on their ability to deliver 2000 ft-lbs of energy to 300 yds (and no more), while keeping muzzle energy and chamber pressures as low as possible.

I am interested in the reasoning behind your choice among these four. You may not change bullets, you may not change the fact that the cartrdge must deliver 2000 ft-lbs to 300yds and no more. I'm including charge information in case that matters to you, but you don't get to change the charges.

Oh yeah... This is strictly for hunting purposes, not target shooting.

Here's the data for the four cartridges:

> > > > > Bullet > > > > > Charge > Pressure> > > Recoil > > Elevation @ 300 yds
.323 . . . . . 195 Hornady . . . 56.41 . . . 53,289 PSI . . . 3228 . . . . . . -6.0"
.338 . . . . . 225 Accubond . . 41.12 . . . 48,521 . . . . . . 2902 . . . . . . -9.4"
.358 . . . . . 250 Partition . . . 44.82 . . . 48,456 . . . . . . 3187 . . . . . . -10.2"
.375 . . . . . 260 Accubond . . 45.8 . . . . 46,697 . . . . . . 3121 . . . . . . -11.3"

In order to scale the bullet costs without having to find the cheapest price, or put them in Euros or AU$ or CAN$s, I have taken the Midway prices for each bullet and scaled them relative to the cheapest one - the 195 Hornady. In other words, if the cost of the 195 Hornady = "1" unit of cost, then:

195 Hornady = 1.000
225 Accubond = 1.846
250 Partition = 2.677
260 Accubond = 2.031

So... for example, you can buy 2.7 of the 195 Hornadys for every one of the 250 Partitions regardless of what country you might be in.

I would choose the .375 for the following reasons in order of importance:

1) Biggest around
2) Lowest recoil
3) Lowest chamber pressure

The cons are:
1) "Worst" (but tolerable to me) trajectory.
2) Bullet cost - Not as bad as the .358, but worse than the .323 or .338.

Charge is irrelevant to me as long as it is above 85% of case capacity, and all of these are.

Paul
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Last edited by gitano; 02-23-2008 at 12:41 PM.. Reason: Clarity
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