sightron ffp vs sfp

Brianma65 said:
So both scopes being = using a crosshair only. No hold ove , just the dials. Which one would be better ? FFP or SFP ? From 100 to 600 yards? And what do you notice in the difference between 17.5 and 24 power at 600 yards ?
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For the distance, get a range finder.... then it gives you a number that you compare to your drop chart and you dial the elevation turret.

For wind, get a wind meter... take a guess on the consistency of that wind and compare to your windage chart and dial the windage turret.

This is your SWAG cold bore shot.... make a good break and make note of where the reticle broke relative to desired POA... spot your impact... adjust accordingly. If you are judging the miss with the reticle, know the values of the subtension before you pull the trigger... it is all in the prep you do before you make noise. If you know what the subtension of the reticle is and want to dial, have at it. If you want to hold over, have at it....

There is no better nor worst.... Neither is going to tell you where to aim or how to adjust... that is up to the shooter. The method the shooter uses to diagnose the firing solution is an individual choice... pick whatever you feel is best. Try it and change if it doesn't suit your needs.

Get behind some scopes and decide how much mag you need/want for the targets and situations you want to shoot in....

Best advice is to get out shooting cause all of this will become very clear very fast... and you are WAYYYY over thinking alot of stuff.

Jerry
 
Mystic Precision said:
I think you are getting muddled with the various reticles on the market today so let's cover things simply and briefly.

SFP - subtension of reticle changes with mag - apparent size of reticle stays the same
FFP - subtension of reticle is constant with mag change - apparent size of the reticle changes.

Hash or Picket Fence reticles - like a ruler, each spacing is the same

BDC reticle - each spacing is DIFFERENT and is supposed to correspond to the drop of groups of ballistically equal cartridge/bullet combos.

For target shooting, the hash/picket fence reticle is the most useful as there are constants that work with EVERYTHING. If going SFP, you just need to know the spacing value for the mag settings you mostly use. For my targets at and beyond 200yds, I am going to be at 24X more often then not... in my STAC 17.5X... in my competition rifles 32 to 40X. If under 200yds, I dont need to hold over for anything.

For BDC reticles, FFP is ideal.. or know the mag you need to get the subtension correct.

If using the reticle for holdover or windage, use it... I don't do the math per se because I am not going to dial as I likely don't have time to dial. If I make a shot and it lands 2 lines to the right, I don't care what the value in MOA or MH is... I just hold over 2 lines to the left and as long as the wind hasn't changed... send it.

If you have time to play with the dials, you have time to do the math so...

SFP or FFP is like MOA or MH... go with what you feel works best. Neither is perfect and there are compromises to their useage. Regardless of the system, you must understand how it works... nothing is "no brainer".

YMMV

Jerry
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maybe I explained it wrong. If o sight my scope in with hornady 168 g and the sub tensions truly work on max power , then it's for that specific bullit. If I change to a nosler 168 the I have to resight in right? So how accurate can using the sub tensions be , for 500 yard shots? If I reload and use the same powder and same bullit , everything would have to be 100% identical with every single rnd that I make, for the hold over marks to be truly accurate? If one reloaded cartridge had any amount of change in bullit weight or powder wouldn't that change your POI at 500 yards. Or would it be so minimal that you wouldn't notice? I was looking for a scope that can be used for hunting and target shooting. It's going on a .308. I don't care if the subtensions are there or not as I'll be using the dials . Like you said if it's close it dosnt matter. If it's far , I'll have time to dial. The 2.5 -17 sounds interesting. I've read that 18 power is sufficient for LR shooting also.
 
OP sorry if I hijacked your thread , I'm looking at the same scopes as you so thought I'd ask a few. I had a 6x24 nightforce and it was very clear. I didn't like that it was heavy and it didn't go low enough on the low end. I also had a sightron (1-7) and it also had beautiful glass but I found it too heavy and too long for that type of scope. I'm looking for a multi purpose scope , but they're hard to find. I think that if your using your dials a SFP scope would be fine. I've narrowed it down to Two.1: VX6 3-18x 44 at 19 ounces. 2: sightron 2.5x17 unsure of the weight. So the leupold has the weight advantage maybe? And the sightron the price advantage? I would think both would have clear glass and good tracking. My rifle is already coming in at 9 lbs ( not sure yet until I get all the parts). So that's why the weight is important to me.
 
I have one of each on a Vortex (not same mag range mind you) and honestly I would just get the SFP next time around for a longer range scope. As Jerry said, you're going to be at max (or where the reticle is calibrated for - not all scopes are calibrated for max magnification) when you're going for groupings.
 
Brianma65 said:
maybe I explained it wrong. If o sight my scope in with hornady 168 g and the sub tensions truly work on max power , then it's for that specific bullit. If I change to a nosler 168 the I have to resight in right? So how accurate can using the sub tensions be , for 500 yard shots? If I reload and use the same powder and same bullit , everything would have to be 100% identical with every single rnd that I make, for the hold over marks to be truly accurate? If one reloaded cartridge had any amount of change in bullit weight or powder wouldn't that change your POI at 500 yards. Or would it be so minimal that you wouldn't notice? I was looking for a scope that can be used for hunting and target shooting. It's going on a .308. I don't care if the subtensions are there or not as I'll be using the dials . Like you said if it's close it dosnt matter. If it's far , I'll have time to dial. The 2.5 -17 sounds interesting. I've read that 18 power is sufficient for LR shooting also.
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I am not a fan of BDC reticle cause they rarely work AND they rarely stay "in tune"... remember that unless you are using temp stable powders, your loads are going to change with ambient conditions. This will affect its flight and that means the reticle may or may not be correct. Air density and humidity also affect flight but at shorter distances, no biggie... but then at shorter distances....

If you use bullets of similar BC's at the same velocity, the flight will be the same or close enough to hit at distance BUT you need to verify as real world results you get may not match what a computer says it should. There are plenty of bullets with similar BC from various manfs.

Here is a trick to help make a BDC reticle match your combo... when testing, see which MAG the reticle best meets your bullets ballistics. I was able to "cheat" my set up to work at 6X vs 9X it was supposed to (reduced velocity load). This was good to 400yds ...far enough

Jerry
 
prairie lover said:
yes jerry I tend to overthink stuff. and I believe if I could get my hands on both scopes to pick one id pick one in 10 minutes. theres just none around here.
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Figure out the role you want the scope to fill... then pick the scope with the features that will fit that role. All will make you happy wrt to optics and mechanicals.

There is a reason, plenty of positive posts for Sightron scopes

Jerry
 
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