DaveK Posted May 10, 2008 Report Share Posted May 10, 2008 I'm loading my .243 Parker Hale Pro Stalker with 44gn Viht 160 and 75gn v-max. At 100 yards it shoots consistent 1" high sub 1" groups. For some reason if I take it out to 150 yards it gets a bit erratic and can shoot low right down to 2" low. I'd have thought that 1" high at 100 should be just about on at 150. Any thoughts? Dave Link to comment Share on other sites More sharing options...
Jay Foxing Posted May 10, 2008 Report Share Posted May 10, 2008 Hi Dave, How long have you had this problem for, has it just started during your last target session. Where is you range, are you prone in a field, off a bench or at a pucker range. Only thing i can think of: if your shooting prone in a field, when your shooting 100yds you have a clear line of sight to your target. Then you back off another 50yds you don't, maybe your bullet path is clipping the odd blade of grass which is causing you erratic groups. Can't think of anything else until you give us some more info on how long its been occurring, how you shoot and where. Hope this help or gives you a bit more food for thought. Don't despair, vast amount of lads with knowledge on this site. I'm sure someone will have the answer. Jay. Link to comment Share on other sites More sharing options...
DaveK Posted May 10, 2008 Author Report Share Posted May 10, 2008 Thanks Jay. I've been reloading for a good few years but this one is beating me. Originally I was able to zero with the 75gn and have the 85gn and factory loads (privi) not too far off. But Being a typical shooter it wasn't good enough and I tried another scope (which was not as good as mine). Since replacing my original scope (and putting the original one back on the rifle) I've started with the zeroing problems. Being a nobber I should have left it when it worked. The scope is solid in the mounts. At 100 it is 1" high with 75gn v-max so that's not an issue. It's only when I take it up to 150 that the problems start and I'm concerned with not being confident of a clean shot on a fox or deer (although I wouldn't use 75 grainers on a deer) Link to comment Share on other sites More sharing options...
Jay Foxing Posted May 10, 2008 Report Share Posted May 10, 2008 Dave, You got me beat, the fact that it shoots and holds a group at 100yds doesn't point towards your kit or your loads in my mind. Can only think its something down at the range, line of sight or wind. Something is different on your 100yd compared to your 150yd range. Hope you get it figured out, i'm interested to know whats happening myself now. Jay. Link to comment Share on other sites More sharing options...
Andrew Posted May 10, 2008 Report Share Posted May 10, 2008 Beats me. Are you shooting on level ground? ~Andrew Link to comment Share on other sites More sharing options...
eldon Posted May 11, 2008 Report Share Posted May 11, 2008 Dave shoot some groups at 200yds and let us know the results. Link to comment Share on other sites More sharing options...
DaveK Posted May 11, 2008 Author Report Share Posted May 11, 2008 Thanks gents. jay, it's not the range. I've zeroed in different fields Andrew ground is predominantly level but I know where you're coming from Eldon, will do but it may be a while before I'm up shooting. Just a thought, I might weigh my remaining v-max heads. Might be a bad batch. Link to comment Share on other sites More sharing options...
DaveK Posted May 11, 2008 Author Report Share Posted May 11, 2008 Just for discussions sake...Barrel length...??? Rifling twist ???? 75gr sounds a touch light for a .243...but the rifling twist will be a better judge of what ya should be using...and what speed. There might be a chance your rifle dont like 75gr vax at longer distances then 100yrds. And that also sounds like a big drop for only a 50 rd distance. Dirty Mod??? 308Panther Barrel length 20" Twist rate 1:10. T8 mod Link to comment Share on other sites More sharing options...
shootingbags Posted May 12, 2008 Report Share Posted May 12, 2008 Barrel length 20"Twist rate 1:10. T8 mod Dave, In the 243 with a 1:10 twist the 75 gr V-max should be ideal. This twist is pretty much spot on for 70-85gn bullets. Link to comment Share on other sites More sharing options...
ejg223 Posted May 12, 2008 Report Share Posted May 12, 2008 Shouldn't she still be rising from 100 to 150. Are you in Australia? edi Link to comment Share on other sites More sharing options...
eldon Posted May 12, 2008 Report Share Posted May 12, 2008 Shouldn't she still be rising from 100 to 150.Are you in Australia? edi I was thinking the same edi, 1'' high at 100yds with this round without looking it up would probably be a 200yd zero? Link to comment Share on other sites More sharing options...
DaveK Posted May 12, 2008 Author Report Share Posted May 12, 2008 I was thinking the same edi, 1'' high at 100yds with this round without looking it up would probably be a 200yd zero? That's what I thought which is why I'm confused. Link to comment Share on other sites More sharing options...
Guest varmartin Posted May 12, 2008 Report Share Posted May 12, 2008 When you shoot at 100 yards what scope mag do you use ?? Also do you change the scope mag for different ranges ?? Quick load predicts 2795fps...is 44 grains a light load ( my BR pushes 75 vmax at 3250fps with 33.5 grains R15 ) Do you get pressure signs ? 47.5grains of V160 is near max load in QL What velocity do you get ?? `Load from a disc` predicts its a HOT load and at max !!! ODD THING !! Post edited to avoid confusion :lol: Link to comment Share on other sites More sharing options...
Streeker59 Posted May 12, 2008 Report Share Posted May 12, 2008 "Ockham's Razor" gentlemen. The prob started after the scope was removed and replaced. Try another scope and see if you still have the unusual drop at 150 yds.... Link to comment Share on other sites More sharing options...
DaveK Posted May 12, 2008 Author Report Share Posted May 12, 2008 When you shoot at 100 yards what scope mag do you use ?? 6x mag Also do you change the scope mag for different ranges ?? kept it at 6 for 150 yds Quick load predicts 2795fps...is 44 grains a light load ( my BR pushes 75 vmax at 3250fps with 33.5 grains R15 ) Do you get pressure signs ? No pressure signs 47.5grains of V160 is near max load in QL Am going to give 46gn a go What velocity do you get ?? No idea `Load from a disc` predicts its a HOT load and at max !!! ODD THING !! Agreed, even the latest Viht manual has increased the loads from the last version I had Post edited to avoid confusion Streeker59 That was on my list to try but I'll gove the 46gn idea a go first and may just load up some viht 140 to see if theres a difference. Thanks guys. Link to comment Share on other sites More sharing options...
Guest varmartin Posted May 12, 2008 Report Share Posted May 12, 2008 "Ockham's Razor" gentlemen. The prob started after the scope was removed and replaced. Try another scope and see if you still have the unusual drop at 150 yds.... How does the scope know what range your shooting at ??? Link to comment Share on other sites More sharing options...
Streeker59 Posted May 12, 2008 Report Share Posted May 12, 2008 How does the scope know what range your shooting at ??? It doesn't but it seems kinda odd that Dave had no prob till he swopped scopes around.. As for the load. I would have thought that N160 was a tad slow for a light bullet and short barrel...? Having said that, everything was fine till he swopped out scopes... Link to comment Share on other sites More sharing options...
Guest varmartin Posted May 12, 2008 Report Share Posted May 12, 2008 My thoughts too mate, there are better powders out there for light bullets in a .243. DaveK will get to the bottom of it soon enough....or with our weird wisdom get totally confused and buy an airgun Link to comment Share on other sites More sharing options...
DaveK Posted May 12, 2008 Author Report Share Posted May 12, 2008 get totally confused and buy an airgun Hmmmm a pcp .243. Now there's a thought Link to comment Share on other sites More sharing options...
eldon Posted May 12, 2008 Report Share Posted May 12, 2008 Dave, if you need the velocity I can get hold of a cronograph. You know me I use to live near you. Paul Link to comment Share on other sites More sharing options...
DaveK Posted May 12, 2008 Author Report Share Posted May 12, 2008 Dave,if you need the velocity I can get hold of a cronograph. You know me I use to live near you. Paul gimme a clue Garforth? Link to comment Share on other sites More sharing options...
DaveK Posted May 13, 2008 Author Report Share Posted May 13, 2008 I think I've sorted it. 75gn V-Max over 41.2gn Viht N-140 Zero was at 153 yards [/img] Link to comment Share on other sites More sharing options...
eldon Posted May 13, 2008 Report Share Posted May 13, 2008 Spot on Dave How you doing. Give us a ring and we can get out together. So what was the answer to this problem then? Link to comment Share on other sites More sharing options...
DaveK Posted May 13, 2008 Author Report Share Posted May 13, 2008 Spot on Dave How you doing. Give us a ring and we can get out together. So what was the answer to this problem then? Changed the powder. I've lost everything electronic a while ago both on the phone and PC (I'm not the best when it comes to elecronical stuff). You'll have to PM me your number. Just loaded some 95gn SST's with 44gn N-160. I might be back ;) Link to comment Share on other sites More sharing options...
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