200 yard velocity ? (.243)

[foxing243]

Hi guys , zeroed inch high 100 yards point a aim and I'm bang on at 200 yards ..
Which I like .


I'm currently getting the above with my factory ammo .

I shoot foxes maximum 200 yards and has been brilliant .

Factory ammo I'm using at moment is hornady superformance 75gr vmax . 3580 fps approx .


I've not long got all my reloading tools together , so I'd like to know what velocities I'm looking at that would give me the same performance as what I've stated above .

Once I've used up the remaining rounds I shall be starting to reload ...


Browning x bolt.stainless fluted 243
1-10 twist

Cheers guys

 

[CJ6]

Getting a chronograph is 1 step in finding how fast the loads are "actually" going regardless of factory claimed speeds (all guns are different). Part of loading your own is that you can improve (most of the time) on factory accuracy and at less cost. You may or may not get the same speeds as a factory round (higher or lower) but you're more likely to find a better load for your type of shooting and accuracy trumps speed in my book at least.

 

[Zero333]

You can pull 1 cartridge apart, dump the powder on a scale, and hope they're using Hodgdon's Superformance powder.. Compare the 2 powders visually and if they appear the same then clone the load. Hodgdon's reloading center lists 49gr as MAX for 75gr bullets.

Best thing to do is like stated above... a chronograph.

 

[Twoboxer]

Hard to answer without knowing your barrel length. Hornady #9 claims 3400fps for its max recommended load of H4350 out of a 24" barrel. Quickload estimates 3359fps given the same data . . . and 3425fps out of a 26" barrel.

Hornady's ballistic calculator says that either fps would yield 1.1" high at 100yds and dead on at 200yds . . . which is probably close enough to what you experience now.

Perhaps more useful . . . many powders will give the 75gr 3250fps out of a 24" barrel . . . and when dead on at 200yds, they are 1.3" high at 100yds. IMO, no practical difference shooting, but a lot of difference in the choices of powders available and hammering your components and firearm.

So maybe go play with online load data and your load books, and an online ballistics calculator. Without a chrono, you can just test the way you have already done, at the range.

 

['Freak]

Makes more sense to me to simply tweak your scope to accommodate any difference in the trajectories of well worked up reloaded rounds once they’ve shown that they’ll notably out shoot any similar factory loaded offering.

 

[Zero333]

What 'Freak said is what I would do.

 

[Brians356]

You can pull 1 cartridge apart, dump the powder on a scale, and hope they're using Hodgdon's Superformance powder.. Compare the 2 powders visually and if they appear the same then clone the load.

FWIW Hodgdon state Superformance canister powder is different from Superformance ammunition powder. Even if they look the same, I personally would not assume anything. Safer to work up conventionally using the published Superformance data.